Roll cc snapshot up to 127605

cc/CCLayerTreeHostImpl.h

Index: cc/CCLayerTreeHostImpl.h
diff --git a/cc/CCLayerTreeHostImpl.h b/cc/CCLayerTreeHostImpl.h
index 44a3cae27c0f3c15c40cf57f946e093ee38ba976..4061d11fd162b4757b9135fa831ca311ac7ded9d 100644
--- a/cc/CCLayerTreeHostImpl.h
+++ b/cc/CCLayerTreeHostImpl.h
@@ -37,6 +37,7 @@ public:
     virtual void didLoseContextOnImplThread() = 0;
     virtual void onSwapBuffersCompleteOnImplThread() = 0;
     virtual void onVSyncParametersChanged(double monotonicTimebase, double intervalInSeconds) = 0;
+    virtual void onCanDrawStateChanged(bool canDraw) = 0;
     virtual void setNeedsRedrawOnImplThread() = 0;
     virtual void setNeedsCommitOnImplThread() = 0;
     virtual void postAnimationEventsToMainThreadOnImplThread(PassOwnPtr<CCAnimationEventsVector>, double wallClockTime) = 0;
@@ -140,7 +141,7 @@ public:
     void setSourceFrameNumber(int frameNumber) { m_sourceFrameNumber = frameNumber; }
 
     bool contentsTexturesPurged() const { return m_contentsTexturesPurged; }
-    void resetContentsTexturesPurged() { m_contentsTexturesPurged = false; }
+    void resetContentsTexturesPurged();
     size_t memoryAllocationLimitBytes() const { return m_memoryAllocationLimitBytes; }
 
     void setViewportSize(const IntSize& layoutViewportSize, const IntSize& deviceViewportSize);