Initial ResizeObserver implementation

third_party/WebKit/Source/core/dom/ElementRareData.h

Index: third_party/WebKit/Source/core/dom/ElementRareData.h
diff --git a/third_party/WebKit/Source/core/dom/ElementRareData.h b/third_party/WebKit/Source/core/dom/ElementRareData.h
index f43a0322431270e46adf942b96107d9577465e69..da63aa13c97555a01eecdb5d8f8c100f114a67e3 100644
--- a/third_party/WebKit/Source/core/dom/ElementRareData.h
+++ b/third_party/WebKit/Source/core/dom/ElementRareData.h
@@ -35,6 +35,7 @@
 #include "core/dom/custom/V0CustomElementDefinition.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/html/ClassList.h"
+#include "core/observer/ResizeObservation.h"

[szager1, 2016/05/23 19:49:10]

Move this to ElementRareData.cpp, and add a forward class declaration to this
file.

[atotic1, 2016/05/25 00:15:52]

Done.

 #include "core/style/StyleInheritedData.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashSet.h"
@@ -138,6 +139,9 @@ public:
         return *m_intersectionObserverData;
     }
 
+    ResizeObservationSet* resizeObserverData() const { return m_resizeObserverData; }
+    ResizeObservationSet& ensureResizeObserverData();
+
     DECLARE_TRACE_AFTER_DISPATCH();
 
     DECLARE_TRACE_WRAPPERS_AFTER_DISPATCH();
@@ -162,6 +166,7 @@ private:
 
     Member<ElementAnimations> m_elementAnimations;
     Member<NodeIntersectionObserverData> m_intersectionObserverData;
+    Member<ResizeObservationSet> m_resizeObserverData;
 
     RefPtr<ComputedStyle> m_computedStyle;
     Member<V0CustomElementDefinition> m_customElementDefinition;