Storage of ComputedStyle separate from LayoutObject.

third_party/WebKit/Source/core/dom/NodeRareData.cpp

Index: third_party/WebKit/Source/core/dom/NodeRareData.cpp
diff --git a/third_party/WebKit/Source/core/dom/NodeRareData.cpp b/third_party/WebKit/Source/core/dom/NodeRareData.cpp
index 9b60294078ea8b616eea30788713dc43b17fbd64..5ce83ba0df7ad16f4fe8555dbc0467efd57a8219 100644
--- a/third_party/WebKit/Source/core/dom/NodeRareData.cpp
+++ b/third_party/WebKit/Source/core/dom/NodeRareData.cpp
@@ -34,12 +34,14 @@
 #include "core/dom/Element.h"
 #include "core/dom/ElementRareData.h"
 #include "core/frame/FrameHost.h"
+#include "core/layout/LayoutObject.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 struct SameSizeAsNodeRareData {
     void* m_pointer;
+    RefPtr<void*> m_refPtr;
     Member<void*> m_willbeMember[2];
     unsigned m_bitfields;
 };
@@ -78,9 +80,25 @@ DEFINE_TRACE_WRAPPERS_AFTER_DISPATCH(NodeRareData)
     visitor->traceWrappers(m_mutationObserverData);
 }
 
+ComputedStyle* NodeRareData::computedStyle() const
+{
+    if (m_layoutObject)
+        return m_layoutObject->mutableStyle();
+    return m_computedStyle.get();
+}
+
+void NodeRareData::setComputedStyle(PassRefPtr<ComputedStyle> computedStyle)
+{
+    if (m_layoutObject)
+        m_layoutObject->setStyleInternal(computedStyle);
+    else
+        m_computedStyle = computedStyle;
+}
+
 void NodeRareData::finalizeGarbageCollectedObject()
 {
     RELEASE_ASSERT(!layoutObject());
+    CHECK(!computedStyle());
     if (m_isElementRareData)
         static_cast<ElementRareData*>(this)->~ElementRareData();
     else