GpuMemoryManager should limit memory allocations based on viewport size for android.

content/common/gpu/gpu_command_buffer_stub.h

 // Copyright (c) 2012 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 CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #define CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_
 #pragma once
 
 #if defined(ENABLE_GPU)
 
@@ skipping 49 matching lines @@
   };
 
  public:
   virtual ~GpuCommandBufferStubBase() {}
 
   // Will not have surface state if this is an offscreen commandbuffer.
   virtual bool client_has_memory_allocation_changed_callback() const = 0;
   virtual bool has_surface_state() const = 0;
   virtual const SurfaceState& surface_state() const = 0;
 
+  virtual gfx::Size GetSurfaceSize() const = 0;
+
   virtual bool IsInSameContextShareGroup(
       const GpuCommandBufferStubBase& other) const = 0;
 
   virtual void SendMemoryAllocationToProxy(
       const GpuMemoryAllocation& allocation) = 0;
 
   virtual void SetMemoryAllocation(
       const GpuMemoryAllocation& allocation) = 0;
 };
 
@@ skipping 33 matching lines @@
 
   // IPC::Message::Sender implementation:
   virtual bool Send(IPC::Message* msg) OVERRIDE;
 
   // GpuCommandBufferStubBase implementation:
   virtual bool client_has_memory_allocation_changed_callback() const OVERRIDE;
   virtual bool has_surface_state() const OVERRIDE;
   virtual const GpuCommandBufferStubBase::SurfaceState& surface_state() const
       OVERRIDE;
 
+  // Returns surface size.
+  virtual gfx::Size GetSurfaceSize() const OVERRIDE;
+
   // Returns true iff |other| is in the same context share group as this stub.
   virtual bool IsInSameContextShareGroup(
       const GpuCommandBufferStubBase& other) const OVERRIDE;
 
   // Sends memory allocation limits to render process.
   virtual void SendMemoryAllocationToProxy(
       const GpuMemoryAllocation& allocation) OVERRIDE;
 
   // Sets buffer usage depending on Memory Allocation
   virtual void SetMemoryAllocation(
@@ skipping 124 matching lines @@
   IDMap<GpuVideoDecodeAccelerator, IDMapOwnPointer> video_decoders_;
 
   ObserverList<DestructionObserver> destruction_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };
 
 #endif  // defined(ENABLE_GPU)
 
 #endif  // CONTENT_COMMON_GPU_GPU_COMMAND_BUFFER_STUB_H_