Unify background color gutters.

chrome/browser/android/compositor/tab_content_manager.cc

 // Copyright 2014 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 "chrome/browser/android/compositor/tab_content_manager.h"
 
 #include <android/bitmap.h>
 #include <stddef.h>
 
 #include <utility>
@@ skipping 116 matching lines @@
 
 void TabContentManager::SetUIResourceProvider(
     ui::UIResourceProvider* ui_resource_provider) {
   thumbnail_cache_->SetUIResourceProvider(ui_resource_provider);
 }
 
 scoped_refptr<cc::Layer> TabContentManager::GetLiveLayer(int tab_id) {
   return live_layer_list_[tab_id];
 }
 
-scoped_refptr<ThumbnailLayer> TabContentManager::GetStaticLayer(
+scoped_refptr<ThumbnailLayer> TabContentManager::GetStaticLayer(int tab_id) {
+  return static_layer_cache_[tab_id];
+}
+
+scoped_refptr<ThumbnailLayer> TabContentManager::GetOrCreateStaticLayer(
     int tab_id,
     bool force_disk_read) {
   Thumbnail* thumbnail = thumbnail_cache_->Get(tab_id, force_disk_read, true);
   scoped_refptr<ThumbnailLayer> static_layer = static_layer_cache_[tab_id];
 
   if (!thumbnail || !thumbnail->ui_resource_id()) {
     if (static_layer.get()) {
       static_layer->layer()->RemoveFromParent();
       static_layer_cache_.erase(tab_id);
     }
@@ skipping 192 matching lines @@
            jint write_queue_max_size,
            jboolean use_approximation_thumbnail) {
   TabContentManager* manager = new TabContentManager(
       env, obj, default_cache_size, approximation_cache_size,
       compression_queue_max_size, write_queue_max_size,
       use_approximation_thumbnail);
   return reinterpret_cast<intptr_t>(manager);
 }
 
 }  // namespace android