Move gpu memory calculations to Compositor.

content/common/gpu/gpu_command_buffer_stub.h

Index: content/common/gpu/gpu_command_buffer_stub.h
diff --git a/content/common/gpu/gpu_command_buffer_stub.h b/content/common/gpu/gpu_command_buffer_stub.h
index 3efa9857a4a3d967ebd889b0847b0191267816d2..ad2c04fc489c3ef4fe9ad55fd4170f4952615a99 100644
--- a/content/common/gpu/gpu_command_buffer_stub.h
+++ b/content/common/gpu/gpu_command_buffer_stub.h
@@ -97,7 +97,6 @@ class GpuCommandBufferStub
   // GpuMemoryManagerClient implementation:
   gfx::Size GetSurfaceSize() const override;
   gpu::gles2::MemoryTracker* GetMemoryTracker() const override;
-  void SetMemoryAllocation(const gpu::MemoryAllocation& allocation) override;
   void SuggestHaveFrontBuffer(bool suggest_have_frontbuffer) override;
   bool GetTotalGpuMemory(uint64* bytes) override;
 
@@ -210,8 +209,6 @@ class GpuCommandBufferStub
   void OnSignalSyncPointAck(uint32 id);
   void OnSignalQuery(uint32 query, uint32 id);
 
-  void OnSetClientHasMemoryAllocationChangedCallback(bool has_callback);
-
   void OnCreateImage(int32 id,
                      gfx::GpuMemoryBufferHandle handle,
                      gfx::Size size,