Do not give GPU memory to backgrounded compositors.

content/common/gpu/gpu_memory_manager_client.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_MEMORY_MANAGER_CLIENT_H_
 #define CONTENT_COMMON_GPU_GPU_MEMORY_MANAGER_CLIENT_H_
 
 #include <list>
 
 #include "base/basictypes.h"
@@ skipping 75 matching lines @@
   bool managed_memory_stats_received_;
 
   // When managed_memory_stats_.bytes_nicetohave leaves the range
   // [low_, high_], then re-adjust memory limits.
   uint64 bytes_nicetohave_limit_low_;
   uint64 bytes_nicetohave_limit_high_;
 
   // The allocation for this client, used transiently during memory policy
   // calculation.
   uint64 bytes_allocation_when_visible_;
-  uint64 bytes_allocation_when_nonvisible_;
 
   // The ideal allocation for this client for three performance levels, used
   // transiently during memory policy calculation.
   uint64 bytes_allocation_ideal_nicetohave_;
   uint64 bytes_allocation_ideal_required_;
   uint64 bytes_allocation_ideal_minimum_;
 
   // Set to disable allocating a frontbuffer or to disable allocations
   // for clients that don't have surfaces.
   bool hibernated_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_MEMORY_MANAGER_CLIENT_H_