Adaptively throttle texture uploads

cc/CCThreadProxy.h

Index: cc/CCThreadProxy.h
diff --git a/cc/CCThreadProxy.h b/cc/CCThreadProxy.h
index a4c802a198c99947eb44d7e2ffa664d348c6bcb4..190e0fb6041149aee1464e0c7fe2be8ddcd56a31 100644
--- a/cc/CCThreadProxy.h
+++ b/cc/CCThreadProxy.h
@@ -49,7 +49,6 @@ public:
     virtual void didAddAnimation() OVERRIDE { }
     virtual void start() OVERRIDE;
     virtual void stop() OVERRIDE;
-    virtual size_t maxPartialTextureUpdates() const OVERRIDE;
     virtual void acquireLayerTextures() OVERRIDE;
     virtual void forceSerializeOnSwapBuffers() OVERRIDE;
 
@@ -93,7 +92,7 @@ private:
     OwnPtr<BeginFrameAndCommitState> m_pendingBeginFrameRequest;
 
     // Called on main thread
-    void beginFrame();
+    void beginFrame(size_t maxPartialTextureUpdates);
     void didCommitAndDrawFrame();
     void didCompleteSwapBuffers();
     void setAnimationEvents(PassOwnPtr<CCAnimationEventsVector>, double wallClockTime);
@@ -108,7 +107,7 @@ private:
         IntRect rect;
     };
     void forceBeginFrameOnImplThread(CCCompletionEvent*);
-    void beginFrameCompleteOnImplThread(CCCompletionEvent*, PassOwnPtr<CCTextureUpdateQueue>, bool contentsTexturesWereDeleted);
+    void beginFrameCompleteOnImplThread(CCCompletionEvent*, PassOwnPtr<CCTextureUpdateQueue>, bool contentsTexturesWereDeleted, size_t maxPartialTextureUpdates);
     void beginFrameAbortedOnImplThread();
     void requestReadbackOnImplThread(ReadbackRequest*);
     void requestStartPageScaleAnimationOnImplThread(IntSize targetPosition, bool useAnchor, float scale, double durationSec);