1 files changed, 95 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/core/layout/layout_object_factory.cc b/chromium/third_party/blink/renderer/core/layout/layout_object_factory.cc
new file mode 100644
index 00000000000..24507395c13
--- /dev/null
+++ b/chromium/third_party/blink/renderer/core/layout/layout_object_factory.cc
@@ -0,0 +1,95 @@
+// Copyright 2018 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "third_party/blink/renderer/core/layout/layout_object_factory.h"
+
+#include "third_party/blink/renderer/core/dom/element.h"
+#include "third_party/blink/renderer/core/layout/layout_block_flow.h"
+#include "third_party/blink/renderer/core/layout/layout_flexible_box.h"
+#include "third_party/blink/renderer/core/layout/layout_list_item.h"
+#include "third_party/blink/renderer/core/layout/layout_table_caption.h"
+#include "third_party/blink/renderer/core/layout/layout_table_cell.h"
+#include "third_party/blink/renderer/core/layout/layout_view.h"
+#include "third_party/blink/renderer/core/layout/ng/layout_ng_block_flow.h"
+#include "third_party/blink/renderer/core/layout/ng/layout_ng_flexible_box.h"
+#include "third_party/blink/renderer/core/layout/ng/layout_ng_table_caption.h"
+#include "third_party/blink/renderer/core/layout/ng/layout_ng_table_cell.h"
+#include "third_party/blink/renderer/core/layout/ng/list/layout_ng_list_item.h"
+#include "third_party/blink/renderer/core/style/computed_style.h"
+#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
+
+namespace blink {
+
+namespace {
+
+inline bool ShouldUseNewLayout(Document& document, const ComputedStyle& style) {
+  if (!RuntimeEnabledFeatures::LayoutNGEnabled())
+    return false;
+  bool requires_ng_block_fragmentation =
+      document.Printing() ||
+      (document.GetLayoutView() &&
+       document.GetLayoutView()->StyleRef().IsOverflowPaged());
+  if (requires_ng_block_fragmentation &&
+      !RuntimeEnabledFeatures::LayoutNGBlockFragmentationEnabled())
+    return false;
+  return !style.ForceLegacyLayout();
+}
+
+inline Element* GetElementForLayoutObject(Node& node) {
+  if (node.IsElementNode())
+    return &ToElement(node);
+  // If |node| is a Document, the layout object is going to be anonymous.
+  DCHECK(node.IsDocumentNode());
+  return nullptr;
+}
+
+}  // anonymous namespace
+
+LayoutBlockFlow* LayoutObjectFactory::CreateBlockFlow(
+    Node& node,
+    const ComputedStyle& style) {
+  Element* element = GetElementForLayoutObject(node);
+  if (ShouldUseNewLayout(node.GetDocument(), style))
+    return new LayoutNGBlockFlow(element);
+  return new LayoutBlockFlow(element);
+}
+
+LayoutBlock* LayoutObjectFactory::CreateFlexibleBox(
+    Node& node,
+    const ComputedStyle& style) {
+  Element* element = GetElementForLayoutObject(node);
+  if (RuntimeEnabledFeatures::LayoutNGFlexBoxEnabled() &&
+      ShouldUseNewLayout(node.GetDocument(), style))
+    return new LayoutNGFlexibleBox(element);
+  return new LayoutFlexibleBox(element);
+}
+
+LayoutBlockFlow* LayoutObjectFactory::CreateListItem(
+    Node& node,
+    const ComputedStyle& style) {
+  Element* element = GetElementForLayoutObject(node);
+  if (ShouldUseNewLayout(node.GetDocument(), style))
+    return new LayoutNGListItem(element);
+  return new LayoutListItem(element);
+}
+
+LayoutTableCaption* LayoutObjectFactory::CreateTableCaption(
+    Node& node,
+    const ComputedStyle& style) {
+  Element* element = GetElementForLayoutObject(node);
+  if (ShouldUseNewLayout(node.GetDocument(), style))
+    return new LayoutNGTableCaption(element);
+  return new LayoutTableCaption(element);
+}
+
+LayoutTableCell* LayoutObjectFactory::CreateTableCell(
+    Node& node,
+    const ComputedStyle& style) {
+  Element* element = GetElementForLayoutObject(node);
+  if (ShouldUseNewLayout(node.GetDocument(), style))
+    return new LayoutNGTableCell(element);
+  return new LayoutTableCell(element);
+}
+
+}  // namespace blink