Blink changes to record interest rects for http://w3c.github.io/frame-timing/

Source/core/frame/FrameView.h

Index: Source/core/frame/FrameView.h
diff --git a/Source/core/frame/FrameView.h b/Source/core/frame/FrameView.h
index b070825eaa8a2775d9494f80f2006c5e4fb18b4a..48d103cc0bf8e86f4be4b48ec4588d37d17842ca 100644
--- a/Source/core/frame/FrameView.h
+++ b/Source/core/frame/FrameView.h
@@ -39,6 +39,7 @@
 #include "platform/scroll/ScrollableArea.h"
 #include "platform/scroll/Scrollbar.h"
 #include "public/platform/WebDisplayMode.h"
+#include "public/platform/WebRect.h"
 #include "wtf/Forward.h"
 #include "wtf/HashSet.h"
 #include "wtf/OwnPtr.h"
@@ -717,6 +718,11 @@ private:
     // LayoutObject for the viewport-defining element (see Document::viewportDefiningElement).
     LayoutObject* viewportLayoutObject();
 
+    typedef WTF::HashMap <const GraphicsLayer*, std::vector<std::pair<int64_t, WebRect>>> GraphicsLayerFrameTimingRequests;
+    void updateFrameTimingRequestsIfNeeded();
+    void collectFrameTimingRequests(GraphicsLayerFrameTimingRequests&);
+    void collectFrameTimingRequestsRecursive(GraphicsLayerFrameTimingRequests&);
+
     LayoutSize m_size;
 
     typedef HashSet<RefPtr<LayoutEmbeddedObject>> EmbeddedObjectSet;