webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 109 insertions, 121 deletions

diff --git a/Source/WebCore/rendering/RenderEmbeddedObject.cpp b/Source/WebCore/rendering/RenderEmbeddedObject.cpp
index da7e35c02..36260dc3b 100644
--- a/Source/WebCore/rendering/RenderEmbeddedObject.cpp
+++ b/Source/WebCore/rendering/RenderEmbeddedObject.cpp
@@ -29,21 +29,20 @@
 #include "ChromeClient.h"
 #include "Cursor.h"
 #include "EventHandler.h"
-#include "Font.h"
+#include "EventNames.h"
+#include "FontCascade.h"
 #include "FontSelector.h"
 #include "Frame.h"
 #include "FrameLoaderClient.h"
 #include "GraphicsContext.h"
 #include "HTMLAppletElement.h"
 #include "HTMLEmbedElement.h"
-#include "HTMLIFrameElement.h"
 #include "HTMLNames.h"
 #include "HTMLObjectElement.h"
 #include "HTMLParamElement.h"
 #include "HTMLPlugInElement.h"
 #include "HitTestResult.h"
 #include "LocalizedStrings.h"
-#include "MIMETypeRegistry.h"
 #include "MouseEvent.h"
 #include "Page.h"
 #include "PaintInfo.h"
@@ -58,10 +57,6 @@
 #include "TextRun.h"
 #include <wtf/StackStats.h>
 
-#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
-#include "HTMLMediaElement.h"
-#endif
-
 namespace WebCore {
 
 using namespace HTMLNames;
@@ -78,32 +73,31 @@ static const float replacementArrowCirclePadding = 3;
 
 static const Color& replacementTextRoundedRectPressedColor()
 {
-    static const Color pressed(105, 105, 105, 242);
+    static NeverDestroyed<Color> pressed(105, 105, 105, 242);
     return pressed;
 }
 
 static const Color& replacementTextRoundedRectColor()
 {
-    static const Color standard(125, 125, 125, 242);
+    static NeverDestroyed<Color> standard(125, 125, 125, 242);
     return standard;
 }
 
 static const Color& replacementTextColor()
 {
-    static const Color standard(240, 240, 240, 255);
+    static NeverDestroyed<Color> standard(240, 240, 240, 255);
     return standard;
 }
 
 static const Color& unavailablePluginBorderColor()
 {
-    static const Color standard(255, 255, 255, 216);
+    static NeverDestroyed<Color> standard(255, 255, 255, 216);
     return standard;
 }
 
-RenderEmbeddedObject::RenderEmbeddedObject(HTMLFrameOwnerElement& element, PassRef<RenderStyle> style)
-    : RenderWidget(element, std::move(style))
+RenderEmbeddedObject::RenderEmbeddedObject(HTMLFrameOwnerElement& element, RenderStyle&& style)
+    : RenderWidget(element, WTFMove(style))
     , m_isPluginUnavailable(false)
-    , m_isUnavailablePluginIndicatorHidden(false)
     , m_unavailablePluginIndicatorIsPressed(false)
     , m_mouseDownWasInUnavailablePluginIndicator(false)
 {
@@ -113,17 +107,22 @@ RenderEmbeddedObject::RenderEmbeddedObject(HTMLFrameOwnerElement& element, PassR
 
 RenderEmbeddedObject::~RenderEmbeddedObject()
 {
+    // Do not add any code here. Add it to willBeDestroyed() instead.
+}
+
+void RenderEmbeddedObject::willBeDestroyed()
+{
     view().frameView().removeEmbeddedObjectToUpdate(*this);
+    RenderWidget::willBeDestroyed();
 }
 
-RenderPtr<RenderEmbeddedObject> RenderEmbeddedObject::createForApplet(HTMLAppletElement& applet, PassRef<RenderStyle> style)
+RenderPtr<RenderEmbeddedObject> RenderEmbeddedObject::createForApplet(HTMLAppletElement& applet, RenderStyle&& style)
 {
-    auto renderer = createRenderer<RenderEmbeddedObject>(applet, std::move(style));
+    auto renderer = createRenderer<RenderEmbeddedObject>(applet, WTFMove(style));
     renderer->setInline(true);
     return renderer;
 }
 
-#if USE(ACCELERATED_COMPOSITING)
 bool RenderEmbeddedObject::requiresLayer() const
 {
     if (RenderWidget::requiresLayer())
@@ -136,12 +135,11 @@ bool RenderEmbeddedObject::allowsAcceleratedCompositing() const
 {
 #if PLATFORM(IOS)
     // The timing of layer creation is different on the phone, since the plugin can only be manipulated from the main thread.
-    return widget() && widget()->isPluginViewBase() && toPluginViewBase(widget())->willProvidePluginLayer();
+    return is<PluginViewBase>(widget()) && downcast<PluginViewBase>(*widget()).willProvidePluginLayer();
 #else
-    return widget() && widget()->isPluginViewBase() && toPluginViewBase(widget())->platformLayer();
+    return is<PluginViewBase>(widget()) && downcast<PluginViewBase>(*widget()).platformLayer();
 #endif
 }
-#endif
 
 #if !PLATFORM(IOS)
 static String unavailablePluginReplacementText(RenderEmbeddedObject::PluginUnavailabilityReason pluginUnavailabilityReason)
@@ -162,10 +160,9 @@ static String unavailablePluginReplacementText(RenderEmbeddedObject::PluginUnava
 }
 #endif
 
-static bool shouldUnavailablePluginMessageBeButton(Document& document, RenderEmbeddedObject::PluginUnavailabilityReason pluginUnavailabilityReason)
+static bool shouldUnavailablePluginMessageBeButton(Page& page, RenderEmbeddedObject::PluginUnavailabilityReason pluginUnavailabilityReason)
 {
-    Page* page = document.page();
-    return page && page->chrome().client().shouldUnavailablePluginMessageBeButton(pluginUnavailabilityReason);
+    return page.chrome().client().shouldUnavailablePluginMessageBeButton(pluginUnavailabilityReason);
 }
 
 void RenderEmbeddedObject::setPluginUnavailabilityReason(PluginUnavailabilityReason pluginUnavailabilityReason)
@@ -198,42 +195,38 @@ void RenderEmbeddedObject::setUnavailablePluginIndicatorIsPressed(bool pressed)
 {
     if (m_unavailablePluginIndicatorIsPressed == pressed)
         return;
-
     m_unavailablePluginIndicatorIsPressed = pressed;
     repaint();
 }
 
-void RenderEmbeddedObject::paintSnapshotImage(PaintInfo& paintInfo, const LayoutPoint& paintOffset, Image* image)
+void RenderEmbeddedObject::paintSnapshotImage(PaintInfo& paintInfo, const LayoutPoint& paintOffset, Image& image)
 {
     LayoutUnit cWidth = contentWidth();
     LayoutUnit cHeight = contentHeight();
     if (!cWidth || !cHeight)
         return;
 
-    GraphicsContext* context = paintInfo.context;
+    GraphicsContext& context = paintInfo.context();
     LayoutSize contentSize(cWidth, cHeight);
     LayoutPoint contentLocation = location() + paintOffset;
     contentLocation.move(borderLeft() + paddingLeft(), borderTop() + paddingTop());
 
     LayoutRect rect(contentLocation, contentSize);
-    IntRect alignedRect = pixelSnappedIntRect(rect);
+    IntRect alignedRect = snappedIntRect(rect);
     if (alignedRect.width() <= 0 || alignedRect.height() <= 0)
         return;
 
-    bool useLowQualityScaling = shouldPaintAtLowQuality(context, image, image, alignedRect.size());
-    ImageOrientationDescription orientationDescription(shouldRespectImageOrientation());
-#if ENABLE(CSS_IMAGE_ORIENTATION)
-    orientationDescription.setImageOrientationEnum(style().imageOrientation());
-#endif
-    context->drawImage(image, style().colorSpace(), alignedRect, CompositeSourceOver, orientationDescription, useLowQualityScaling);
+    InterpolationQuality interpolation = chooseInterpolationQuality(context, image, &image, alignedRect.size());
+    ImageOrientationDescription orientationDescription(shouldRespectImageOrientation(), style().imageOrientation());
+    context.drawImage(image, alignedRect, ImagePaintingOptions(orientationDescription, interpolation));
 }
 
 void RenderEmbeddedObject::paintContents(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
-    if (!frameOwnerElement().isPluginElement())
+    if (!is<HTMLPlugInElement>(frameOwnerElement()))
         return;
 
-    HTMLPlugInElement& plugInElement = toHTMLPlugInElement(frameOwnerElement());
+    HTMLPlugInElement& plugInElement = downcast<HTMLPlugInElement>(frameOwnerElement());
 
     if (plugInElement.displayState() > HTMLPlugInElement::DisplayingSnapshot) {
         RenderWidget::paintContents(paintInfo, paintOffset);
@@ -241,34 +234,34 @@ void RenderEmbeddedObject::paintContents(PaintInfo& paintInfo, const LayoutPoint
             return;
     }
 
-    if (!plugInElement.isPlugInImageElement())
+    if (!is<HTMLPlugInImageElement>(plugInElement))
         return;
 
-    Image* snapshot = toHTMLPlugInImageElement(plugInElement).snapshotImage();
-    if (snapshot)
-        paintSnapshotImage(paintInfo, paintOffset, snapshot);
+    if (Image* snapshot = downcast<HTMLPlugInImageElement>(plugInElement).snapshotImage())
+        paintSnapshotImage(paintInfo, paintOffset, *snapshot);
 }
 
 void RenderEmbeddedObject::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
-    Page* page = frame().page();
+    // The relevant repainted object heuristic is not tuned for plugin documents.
+    bool countsTowardsRelevantObjects = !document().isPluginDocument() && paintInfo.phase == PaintPhaseForeground;
 
     if (isPluginUnavailable()) {
-        if (page && paintInfo.phase == PaintPhaseForeground)
-            page->addRelevantUnpaintedObject(this, visualOverflowRect());
+        if (countsTowardsRelevantObjects)
+            page().addRelevantUnpaintedObject(this, visualOverflowRect());
         RenderReplaced::paint(paintInfo, paintOffset);
         return;
     }
 
-    if (page && paintInfo.phase == PaintPhaseForeground)
-        page->addRelevantRepaintedObject(this, visualOverflowRect());
+    if (countsTowardsRelevantObjects)
+        page().addRelevantRepaintedObject(this, visualOverflowRect());
 
     RenderWidget::paint(paintInfo, paintOffset);
 }
 
-static void drawReplacementArrow(GraphicsContext* context, const FloatRect& insideRect)
+static void drawReplacementArrow(GraphicsContext& context, const FloatRect& insideRect)
 {
-    GraphicsContextStateSaver stateSaver(*context);
+    GraphicsContextStateSaver stateSaver(context);
 
     FloatRect rect(insideRect);
     rect.inflate(-replacementArrowPadding);
@@ -276,9 +269,9 @@ static void drawReplacementArrow(GraphicsContext* context, const FloatRect& insi
     FloatPoint center(rect.center());
     FloatPoint arrowTip(rect.maxX(), center.y());
 
-    context->setStrokeThickness(2);
-    context->setLineCap(RoundCap);
-    context->setLineJoin(RoundJoin);
+    context.setStrokeThickness(2);
+    context.setLineCap(RoundCap);
+    context.setLineJoin(RoundJoin);
 
     Path path;
     path.moveTo(FloatPoint(rect.x(), center.y()));
@@ -286,7 +279,7 @@ static void drawReplacementArrow(GraphicsContext* context, const FloatRect& insi
     path.addLineTo(FloatPoint(center.x(), rect.y()));
     path.moveTo(arrowTip);
     path.addLineTo(FloatPoint(center.x(), rect.maxY()));
-    context->strokePath(path);
+    context.strokePath(path);
 }
 
 void RenderEmbeddedObject::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
@@ -297,16 +290,16 @@ void RenderEmbeddedObject::paintReplaced(PaintInfo& paintInfo, const LayoutPoint
     if (paintInfo.phase == PaintPhaseSelection)
         return;
 
-    GraphicsContext* context = paintInfo.context;
-    if (context->paintingDisabled())
+    GraphicsContext& context = paintInfo.context();
+    if (context.paintingDisabled())
         return;
 
     FloatRect contentRect;
     FloatRect indicatorRect;
     FloatRect replacementTextRect;
     FloatRect arrowRect;
-    Font font;
-    TextRun run("");
+    FontCascade font;
+    TextRun run(emptyString());
     float textWidth;
     if (!getReplacementTextGeometry(paintOffset, contentRect, indicatorRect, replacementTextRect, arrowRect, font, run, textWidth))
         return;
@@ -314,59 +307,61 @@ void RenderEmbeddedObject::paintReplaced(PaintInfo& paintInfo, const LayoutPoint
     Path background;
     background.addRoundedRect(indicatorRect, FloatSize(replacementTextRoundedRectRadius, replacementTextRoundedRectRadius));
 
-    GraphicsContextStateSaver stateSaver(*context);
-    context->clip(contentRect);
-    context->setFillColor(m_unavailablePluginIndicatorIsPressed ? replacementTextRoundedRectPressedColor() : replacementTextRoundedRectColor(), style().colorSpace());
-    context->fillPath(background);
+    GraphicsContextStateSaver stateSaver(context);
+    context.clip(contentRect);
+    context.setFillColor(m_unavailablePluginIndicatorIsPressed ? replacementTextRoundedRectPressedColor() : replacementTextRoundedRectColor());
+    context.fillPath(background);
 
     Path strokePath;
     FloatRect strokeRect(indicatorRect);
     strokeRect.inflate(1);
     strokePath.addRoundedRect(strokeRect, FloatSize(replacementTextRoundedRectRadius + 1, replacementTextRoundedRectRadius + 1));
 
-    context->setStrokeColor(unavailablePluginBorderColor(), style().colorSpace());
-    context->setStrokeThickness(2);
-    context->strokePath(strokePath);
+    context.setStrokeColor(unavailablePluginBorderColor());
+    context.setStrokeThickness(2);
+    context.strokePath(strokePath);
 
     const FontMetrics& fontMetrics = font.fontMetrics();
     float labelX = roundf(replacementTextRect.location().x() + replacementTextRoundedRectLeftTextMargin);
     float labelY = roundf(replacementTextRect.location().y() + (replacementTextRect.size().height() - fontMetrics.height()) / 2 + fontMetrics.ascent() + replacementTextRoundedRectTopTextMargin);
-    context->setFillColor(replacementTextColor(), style().colorSpace());
-    context->drawBidiText(font, run, FloatPoint(labelX, labelY));
+    context.setFillColor(replacementTextColor());
+    context.drawBidiText(font, run, FloatPoint(labelX, labelY));
 
-    if (shouldUnavailablePluginMessageBeButton(document(), m_pluginUnavailabilityReason)) {
+    if (shouldUnavailablePluginMessageBeButton(page(), m_pluginUnavailabilityReason)) {
         arrowRect.inflate(-replacementArrowCirclePadding);
 
-        context->beginTransparencyLayer(1.0);
-        context->setFillColor(replacementTextColor(), style().colorSpace());
-        context->fillEllipse(arrowRect);
+        context.beginTransparencyLayer(1.0);
+        context.setFillColor(replacementTextColor());
+        context.fillEllipse(arrowRect);
 
-        context->setCompositeOperation(CompositeClear);
+        context.setCompositeOperation(CompositeClear);
         drawReplacementArrow(context, arrowRect);
-        context->endTransparencyLayer();
+        context.endTransparencyLayer();
     }
 }
 
 void RenderEmbeddedObject::setUnavailablePluginIndicatorIsHidden(bool hidden)
 {
-    m_isUnavailablePluginIndicatorHidden = hidden;
-
+    auto newState = hidden ? UnavailablePluginIndicatorState::Hidden : UnavailablePluginIndicatorState::Visible;
+    if (m_isUnavailablePluginIndicatorState == newState)
+        return;
+    m_isUnavailablePluginIndicatorState = newState;
     repaint();
 }
 
-bool RenderEmbeddedObject::getReplacementTextGeometry(const LayoutPoint& accumulatedOffset, FloatRect& contentRect, FloatRect& indicatorRect, FloatRect& replacementTextRect, FloatRect& arrowRect, Font& font, TextRun& run, float& textWidth) const
+bool RenderEmbeddedObject::getReplacementTextGeometry(const LayoutPoint& accumulatedOffset, FloatRect& contentRect, FloatRect& indicatorRect, FloatRect& replacementTextRect, FloatRect& arrowRect, FontCascade& font, TextRun& run, float& textWidth) const
 {
-    bool includesArrow = shouldUnavailablePluginMessageBeButton(document(), m_pluginUnavailabilityReason);
+    bool includesArrow = shouldUnavailablePluginMessageBeButton(page(), m_pluginUnavailabilityReason);
 
     contentRect = contentBoxRect();
     contentRect.moveBy(roundedIntPoint(accumulatedOffset));
 
-    FontDescription fontDescription;
+    FontCascadeDescription fontDescription;
     RenderTheme::defaultTheme()->systemFont(CSSValueWebkitSmallControl, fontDescription);
     fontDescription.setWeight(FontWeightBold);
-    fontDescription.setRenderingMode(frame().settings().fontRenderingMode());
+    fontDescription.setRenderingMode(settings().fontRenderingMode());
     fontDescription.setComputedSize(12);
-    font = Font(fontDescription, 0, 0);
+    font = FontCascade(fontDescription, 0, 0);
     font.update(0);
 
     run = TextRun(m_unavailablePluginReplacementText);
@@ -396,8 +391,8 @@ LayoutRect RenderEmbeddedObject::unavailablePluginIndicatorBounds(const LayoutPo
     FloatRect indicatorRect;
     FloatRect replacementTextRect;
     FloatRect arrowRect;
-    Font font;
-    TextRun run("", 0);
+    FontCascade font;
+    TextRun run(emptyString());
     float textWidth;
     if (getReplacementTextGeometry(accumulatedOffset, contentRect, indicatorRect, replacementTextRect, arrowRect, font, run, textWidth))
         return LayoutRect(indicatorRect);
@@ -429,12 +424,14 @@ bool RenderEmbeddedObject::isReplacementObscured() const
     if (!rootRenderView)
         return true;
 
-    IntRect rootViewRect = view().frameView().convertToRootView(pixelSnappedIntRect(rect));
-    
-    HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::IgnoreClipping | HitTestRequest::DisallowShadowContent | HitTestRequest::AllowChildFrameContent);
+    // We should always start hit testing a clean tree.
+    view().frameView().updateLayoutAndStyleIfNeededRecursive();
+
+    HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::IgnoreClipping | HitTestRequest::DisallowUserAgentShadowContent | HitTestRequest::AllowChildFrameContent);
     HitTestResult result;
     HitTestLocation location;
     
+    IntRect rootViewRect = view().frameView().convertToRootView(snappedIntRect(rect));
     LayoutUnit x = rootViewRect.x();
     LayoutUnit y = rootViewRect.y();
     LayoutUnit width = rootViewRect.width();
@@ -500,8 +497,8 @@ void RenderEmbeddedObject::layout()
 
     if (!wasMissingWidget && newSize.width() >= oldSize.width() && newSize.height() >= oldSize.height()) {
         HTMLFrameOwnerElement& element = frameOwnerElement();
-        if (element.isPluginElement() && toHTMLPlugInElement(element).isPlugInImageElement()) {
-            HTMLPlugInImageElement& plugInImageElement = toHTMLPlugInImageElement(element);
+        if (is<HTMLPlugInImageElement>(element)) {
+            HTMLPlugInImageElement& plugInImageElement = downcast<HTMLPlugInImageElement>(element);
             if (plugInImageElement.displayState() > HTMLPlugInElement::DisplayingSnapshot && plugInImageElement.snapshotDecision() == HTMLPlugInImageElement::MaySnapshotWhenResized) {
                 plugInImageElement.setNeedsCheckForSizeChange();
                 view().frameView().addEmbeddedObjectToUpdate(*this);
@@ -518,12 +515,9 @@ void RenderEmbeddedObject::layout()
     if (!child)
         return;
 
-    RenderBox* childBox = toRenderBox(child);
+    auto& childBox = downcast<RenderBox>(*child);
 
-    if (!childBox)
-        return;
-
-    if (newSize == oldSize && !childBox->needsLayout())
+    if (newSize == oldSize && !childBox.needsLayout())
         return;
     
     // When calling layout() on a child node, a parent must either push a LayoutStateMaintainter, or
@@ -531,11 +525,11 @@ void RenderEmbeddedObject::layout()
     // and this method will be called many times per second during playback, use a LayoutStateMaintainer:
     LayoutStateMaintainer statePusher(view(), *this, locationOffset(), hasTransform() || hasReflection() || style().isFlippedBlocksWritingMode());
     
-    childBox->setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop()));
-    childBox->style().setHeight(Length(newSize.height(), Fixed));
-    childBox->style().setWidth(Length(newSize.width(), Fixed));
-    childBox->setNeedsLayout(MarkOnlyThis);
-    childBox->layout();
+    childBox.setLocation(LayoutPoint(borderLeft(), borderTop()) + LayoutSize(paddingLeft(), paddingTop()));
+    childBox.mutableStyle().setHeight(Length(newSize.height(), Fixed));
+    childBox.mutableStyle().setWidth(Length(newSize.width(), Fixed));
+    childBox.setNeedsLayout(MarkOnlyThis);
+    childBox.layout();
     clearChildNeedsLayout();
     
     statePusher.pop();
@@ -546,20 +540,20 @@ bool RenderEmbeddedObject::nodeAtPoint(const HitTestRequest& request, HitTestRes
     if (!RenderWidget::nodeAtPoint(request, result, locationInContainer, accumulatedOffset, hitTestAction))
         return false;
 
-    if (!widget() || !widget()->isPluginViewBase())
+    if (!is<PluginViewBase>(widget()))
         return true;
 
-    PluginViewBase* view = toPluginViewBase(widget());
+    PluginViewBase& view = downcast<PluginViewBase>(*widget());
     IntPoint roundedPoint = locationInContainer.roundedPoint();
 
-    if (Scrollbar* horizontalScrollbar = view->horizontalScrollbar()) {
+    if (Scrollbar* horizontalScrollbar = view.horizontalScrollbar()) {
         if (horizontalScrollbar->shouldParticipateInHitTesting() && horizontalScrollbar->frameRect().contains(roundedPoint)) {
             result.setScrollbar(horizontalScrollbar);
             return true;
         }
     }
 
-    if (Scrollbar* verticalScrollbar = view->verticalScrollbar()) {
+    if (Scrollbar* verticalScrollbar = view.verticalScrollbar()) {
         if (verticalScrollbar->shouldParticipateInHitTesting() && verticalScrollbar->frameRect().contains(roundedPoint)) {
             result.setScrollbar(verticalScrollbar);
             return true;
@@ -571,10 +565,10 @@ bool RenderEmbeddedObject::nodeAtPoint(const HitTestRequest& request, HitTestRes
 
 bool RenderEmbeddedObject::scroll(ScrollDirection direction, ScrollGranularity granularity, float, Element**, RenderBox*, const IntPoint&)
 {
-    if (!widget() || !widget()->isPluginViewBase())
+    if (!is<PluginViewBase>(widget()))
         return false;
 
-    return toPluginViewBase(widget())->scroll(direction, granularity);
+    return downcast<PluginViewBase>(*widget()).scroll(direction, granularity);
 }
 
 bool RenderEmbeddedObject::logicalScroll(ScrollLogicalDirection direction, ScrollGranularity granularity, float multiplier, Element** stopElement)
@@ -584,65 +578,64 @@ bool RenderEmbeddedObject::logicalScroll(ScrollLogicalDirection direction, Scrol
 }
 
 
-bool RenderEmbeddedObject::isInUnavailablePluginIndicator(const LayoutPoint& point) const
+bool RenderEmbeddedObject::isInUnavailablePluginIndicator(const FloatPoint& point) const
 {
     FloatRect contentRect;
     FloatRect indicatorRect;
     FloatRect replacementTextRect;
     FloatRect arrowRect;
-    Font font;
-    TextRun run("");
+    FontCascade font;
+    TextRun run(emptyString());
     float textWidth;
     return getReplacementTextGeometry(IntPoint(), contentRect, indicatorRect, replacementTextRect, arrowRect, font, run, textWidth)
         && indicatorRect.contains(point);
 }
 
-bool RenderEmbeddedObject::isInUnavailablePluginIndicator(MouseEvent* event) const
+bool RenderEmbeddedObject::isInUnavailablePluginIndicator(const MouseEvent& event) const
 {
-    return isInUnavailablePluginIndicator(roundedLayoutPoint(absoluteToLocal(event->absoluteLocation(), UseTransforms)));
+    return isInUnavailablePluginIndicator(absoluteToLocal(event.absoluteLocation(), UseTransforms));
 }
 
 void RenderEmbeddedObject::handleUnavailablePluginIndicatorEvent(Event* event)
 {
-    if (!shouldUnavailablePluginMessageBeButton(document(), m_pluginUnavailabilityReason))
+    if (!shouldUnavailablePluginMessageBeButton(page(), m_pluginUnavailabilityReason))
         return;
 
-    if (!event->isMouseEvent())
+    if (!is<MouseEvent>(*event))
         return;
 
-    MouseEvent* mouseEvent = static_cast<MouseEvent*>(event);
-    HTMLPlugInElement& element = toHTMLPlugInElement(frameOwnerElement());
-    if (event->type() == eventNames().mousedownEvent && static_cast<MouseEvent*>(event)->button() == LeftButton) {
+    MouseEvent& mouseEvent = downcast<MouseEvent>(*event);
+    HTMLPlugInElement& element = downcast<HTMLPlugInElement>(frameOwnerElement());
+    if (mouseEvent.type() == eventNames().mousedownEvent && mouseEvent.button() == LeftButton) {
         m_mouseDownWasInUnavailablePluginIndicator = isInUnavailablePluginIndicator(mouseEvent);
         if (m_mouseDownWasInUnavailablePluginIndicator) {
             frame().eventHandler().setCapturingMouseEventsElement(&element);
             element.setIsCapturingMouseEvents(true);
             setUnavailablePluginIndicatorIsPressed(true);
         }
-        event->setDefaultHandled();
+        mouseEvent.setDefaultHandled();
     }
-    if (event->type() == eventNames().mouseupEvent && static_cast<MouseEvent*>(event)->button() == LeftButton) {
+    if (mouseEvent.type() == eventNames().mouseupEvent && mouseEvent.button() == LeftButton) {
         if (m_unavailablePluginIndicatorIsPressed) {
             frame().eventHandler().setCapturingMouseEventsElement(nullptr);
             element.setIsCapturingMouseEvents(false);
             setUnavailablePluginIndicatorIsPressed(false);
         }
         if (m_mouseDownWasInUnavailablePluginIndicator && isInUnavailablePluginIndicator(mouseEvent)) {
-            if (Page* page = document().page())
-                page->chrome().client().unavailablePluginButtonClicked(&element, m_pluginUnavailabilityReason);
+            page().chrome().client().unavailablePluginButtonClicked(element, m_pluginUnavailabilityReason);
         }
         m_mouseDownWasInUnavailablePluginIndicator = false;
         event->setDefaultHandled();
     }
-    if (event->type() == eventNames().mousemoveEvent) {
+    if (mouseEvent.type() == eventNames().mousemoveEvent) {
         setUnavailablePluginIndicatorIsPressed(m_mouseDownWasInUnavailablePluginIndicator && isInUnavailablePluginIndicator(mouseEvent));
-        event->setDefaultHandled();
+        mouseEvent.setDefaultHandled();
     }
 }
 
 CursorDirective RenderEmbeddedObject::getCursor(const LayoutPoint& point, Cursor& cursor) const
 {
-    if (showsUnavailablePluginIndicator() && shouldUnavailablePluginMessageBeButton(document(), m_pluginUnavailabilityReason) && isInUnavailablePluginIndicator(point)) {
+    if (showsUnavailablePluginIndicator() && shouldUnavailablePluginMessageBeButton(page(), m_pluginUnavailabilityReason) && isInUnavailablePluginIndicator(point)) {
         cursor = handCursor();
         return SetCursor;
     }
@@ -655,11 +648,6 @@ CursorDirective RenderEmbeddedObject::getCursor(const LayoutPoint& point, Cursor
 
 bool RenderEmbeddedObject::canHaveChildren() const
 {
-#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
-    if (frameOwnerElement().isMediaElement())
-        return true;
-#endif
-
     if (isSnapshottedPlugIn())
         return true;