Do not give GPU memory to backgrounded compositors.

content/common/gpu/gpu_memory_manager_client.cc

 // 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.
 
 #include "content/common/gpu/gpu_memory_manager_client.h"
 
 #include "content/common/gpu/gpu_memory_manager.h"
 
 namespace content {
 
 GpuMemoryManagerClientState::GpuMemoryManagerClientState(
     GpuMemoryManager* memory_manager,
     GpuMemoryManagerClient* client,
     GpuMemoryTrackingGroup* tracking_group,
     bool has_surface,
     bool visible)
     : memory_manager_(memory_manager),
       client_(client),
       tracking_group_(tracking_group),
       has_surface_(has_surface),
       visible_(visible),
       list_iterator_valid_(false),
       managed_memory_stats_received_(false),
       bytes_nicetohave_limit_low_(0),
       bytes_nicetohave_limit_high_(0),
       bytes_allocation_when_visible_(0),
-      bytes_allocation_when_nonvisible_(0),
       bytes_allocation_ideal_nicetohave_(0),
       bytes_allocation_ideal_required_(0),
       bytes_allocation_ideal_minimum_(0),
       hibernated_(false) {
 }
 
 GpuMemoryManagerClientState::~GpuMemoryManagerClientState() {
   memory_manager_->OnDestroyClientState(this);
 }
 
 void GpuMemoryManagerClientState::SetVisible(bool visible) {
   memory_manager_->SetClientStateVisible(this, visible);
 }
 
 void GpuMemoryManagerClientState::SetManagedMemoryStats(
     const gpu::ManagedMemoryStats& stats) {
   memory_manager_->SetClientStateManagedMemoryStats(this, stats);
 }
 
 }  // namespace content