1 files changed, 33 insertions, 0 deletions
diff --git a/chromium/third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp b/chromium/third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp
index 4542e506be9..a135845e036 100644
--- a/chromium/third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp
+++ b/chromium/third_party/WebKit/Source/core/svg/SVGDocumentExtensions.cpp
@@ -28,6 +28,7 @@
 #include "core/svg/SVGElement.h"
 #include "core/svg/SVGSVGElement.h"
 #include "core/svg/animation/SMILTimeContainer.h"
+#include "wtf/TemporaryChange.h"
 #include "wtf/text/AtomicString.h"
 
 namespace WebCore {
@@ -35,6 +36,9 @@ namespace WebCore {
 SVGDocumentExtensions::SVGDocumentExtensions(Document* document)
     : m_document(document)
     , m_resourcesCache(adoptPtr(new SVGResourcesCache))
+#if !ASSERT_DISABLED
+    , m_inRelativeLengthSVGRootsInvalidation(false)
+#endif
 {
 }
 
@@ -367,6 +371,35 @@ void SVGDocumentExtensions::removeAllElementReferencesForTarget(SVGElement* refe
     m_elementDependencies.remove(it);
 }
 
+void SVGDocumentExtensions::addSVGRootWithRelativeLengthDescendents(SVGSVGElement* svgRoot)
+{
+    ASSERT(!m_inRelativeLengthSVGRootsInvalidation);
+    m_relativeLengthSVGRoots.add(svgRoot);
+}
+
+void SVGDocumentExtensions::removeSVGRootWithRelativeLengthDescendents(SVGSVGElement* svgRoot)
+{
+    ASSERT(!m_inRelativeLengthSVGRootsInvalidation);
+    m_relativeLengthSVGRoots.remove(svgRoot);
+}
+
+bool SVGDocumentExtensions::isSVGRootWithRelativeLengthDescendents(SVGSVGElement* svgRoot) const
+{
+    return m_relativeLengthSVGRoots.contains(svgRoot);
+}
+
+void SVGDocumentExtensions::invalidateSVGRootsWithRelativeLengthDescendents(SubtreeLayoutScope* scope)
+{
+    ASSERT(!m_inRelativeLengthSVGRootsInvalidation);
+#if !ASSERT_DISABLED
+    TemporaryChange<bool> inRelativeLengthSVGRootsChange(m_inRelativeLengthSVGRootsInvalidation, true);
+#endif
+
+    HashSet<SVGSVGElement*>::iterator end = m_relativeLengthSVGRoots.end();
+    for (HashSet<SVGSVGElement*>::iterator it = m_relativeLengthSVGRoots.begin(); it != end; ++it)
+        (*it)->invalidateRelativeLengthClients(scope);
+}
+
 #if ENABLE(SVG_FONTS)
 void SVGDocumentExtensions::registerSVGFontFaceElement(SVGFontFaceElement* element)
 {