Don't spam the GPU process with memory usage stats

cc/layer_tree_host_impl.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYER_TREE_HOST_IMPL_H_
 #define CC_LAYER_TREE_HOST_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
@@ skipping 232 matching lines @@
 
     bool needsAnimateLayers() const { return m_needsAnimateLayers; }
     void setNeedsAnimateLayers() { m_needsAnimateLayers = true; }
 
     void setNeedsRedraw();
 
     void renderingStats(RenderingStats*) const;
 
     void updateRootScrollLayerImplTransform();
 
+    void sendManagedMemoryStats(
+       size_t memoryVisibleBytes,
+       size_t memoryVisibleAndNearbyBytes,
+       size_t memoryUseBytes);
+
     FrameRateCounter* fpsCounter() const { return m_fpsCounter.get(); }
     DebugRectHistory* debugRectHistory() const { return m_debugRectHistory.get(); }
     ResourceProvider* resourceProvider() const { return m_resourceProvider.get(); }
     Proxy* proxy() const { return m_proxy; }
 
     void setDebugState(const LayerTreeDebugState& debugState) { m_debugState = debugState; }
     const LayerTreeDebugState& debugState() const { return m_debugState; }
 
     class CC_EXPORT CullRenderPassesWithCachedTextures {
     public:
@@ skipping 111 matching lines @@
     PinchZoomViewport m_pinchZoomViewport;
 
     scoped_ptr<FrameRateCounter> m_fpsCounter;
     scoped_ptr<DebugRectHistory> m_debugRectHistory;
 
     size_t m_numImplThreadScrolls;
     size_t m_numMainThreadScrolls;
 
     size_t m_cumulativeNumLayersDrawn;
 
+    size_t m_lastSentMemoryVisibleBytes;
+    size_t m_lastSentMemoryVisibleAndNearbyBytes;
+    size_t m_lastSentMemoryUseBytes;
+
     DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYER_TREE_HOST_IMPL_H_