Revert of Move gpu memory calculations to Compositor.

content/common/gpu/client/command_buffer_proxy_impl.h

Index: content/common/gpu/client/command_buffer_proxy_impl.h
diff --git a/content/common/gpu/client/command_buffer_proxy_impl.h b/content/common/gpu/client/command_buffer_proxy_impl.h
index 39bc76bc316e6856991ce2970e5d47354384dc51..1cf7e6e4a18571189ef974876b981a6732afdd23 100644
--- a/content/common/gpu/client/command_buffer_proxy_impl.h
+++ b/content/common/gpu/client/command_buffer_proxy_impl.h
@@ -135,6 +135,10 @@ class CommandBufferProxyImpl
   bool ProduceFrontBuffer(const gpu::Mailbox& mailbox);
   void SetContextLostCallback(const base::Closure& callback);
 
+  typedef base::Callback<void(const gpu::MemoryAllocation&)>
+      MemoryAllocationChangedCallback;
+  void SetMemoryAllocationChangedCallback(
+      const MemoryAllocationChangedCallback& callback);
   void AddDeletionObserver(DeletionObserver* observer);
   void RemoveDeletionObserver(DeletionObserver* observer);
 
@@ -190,6 +194,7 @@ class CommandBufferProxyImpl
   void OnDestroyed(gpu::error::ContextLostReason reason,
                    gpu::error::Error error);
   void OnConsoleMessage(const GPUCommandBufferConsoleMessage& message);
+  void OnSetMemoryAllocation(const gpu::MemoryAllocation& allocation);
   void OnSignalAck(uint32 id);
   void OnSwapBuffersCompleted(const std::vector<ui::LatencyInfo>& latency_info,
                               gfx::SwapResult result);
@@ -240,6 +245,8 @@ class CommandBufferProxyImpl
 
   base::Closure context_lost_callback_;
 
+  MemoryAllocationChangedCallback memory_allocation_changed_callback_;
+
   GpuConsoleMessageCallback console_message_callback_;
 
   // Tasks to be invoked in SignalSyncPoint responses.