Plumb CompositingReason from Blink to compositor.

Source/core/platform/graphics/GraphicsLayer.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 #include "core/platform/graphics/PlatformLayer.h"
 #include "core/platform/graphics/chromium/OpaqueRectTrackingContentLayerDelegate.h"
 #include "core/platform/graphics/filters/FilterOperations.h"
 #include "core/platform/graphics/transforms/TransformOperations.h"
 #include "core/platform/graphics/transforms/TransformationMatrix.h"
 
 #include "wtf/HashMap.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
+#include <public/WebCompositingReasons.h>
 #include <public/WebContentLayer.h>
 #include <public/WebImageLayer.h>
 #include <public/WebLayer.h>
 #include <public/WebSolidColorLayer.h>
 
 enum LayerTreeAsTextBehaviorFlags {
     LayerTreeAsTextBehaviorNormal = 0,
     LayerTreeAsTextDebug = 1 << 0, // Dump extra debugging info like layer addresses.
     LayerTreeAsTextIncludeVisibleRects = 1 << 1,
     LayerTreeAsTextIncludeRepaintRects = 1 << 2,
@@ skipping 169 matching lines @@
 
     GraphicsLayerClient* client() const { return m_client; }
 
     // Layer name. Only used to identify layers in debug output
     const String& name() const { return m_name; }
     void setName(const String&);
 
     // Layer ID from platform-specific layer. Only used to identify layers in the compositor for debugging purposes.
     int debugID() const;
 
+    void setCompositingReasons(WebKit::WebCompositingReasons);
+
     GraphicsLayer* parent() const { return m_parent; };
     void setParent(GraphicsLayer*); // Internal use only.
     
     // Returns true if the layer has the given layer as an ancestor (excluding self).
     bool hasAncestor(GraphicsLayer*) const;
     
     const Vector<GraphicsLayer*>& children() const { return m_children; }
     // Returns true if the child list changed.
     bool setChildren(const Vector<GraphicsLayer*>&);
 
@@ skipping 331 matching lines @@
 
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showGraphicsLayerTree(const WebCore::GraphicsLayer* layer);
 #endif
 
 #endif // GraphicsLayer_h