Unify background color gutters.

chrome/browser/android/compositor/tab_content_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_COMPOSITOR_TAB_CONTENT_MANAGER_H_
 #define CHROME_BROWSER_ANDROID_COMPOSITOR_TAB_CONTENT_MANAGER_H_
 
 #include <jni.h>
 
 #include <unordered_map>
@@ skipping 35 matching lines @@
 
   virtual ~TabContentManager();
 
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
   void SetUIResourceProvider(ui::UIResourceProvider* ui_resource_provider);
 
   // Get the live layer from the cache.
   scoped_refptr<cc::Layer> GetLiveLayer(int tab_id);
 
+  scoped_refptr<ThumbnailLayer> GetStaticLayer(int tab_id);
+
   // Get the static thumbnail from the cache, or the NTP.
-  scoped_refptr<ThumbnailLayer> GetStaticLayer(int tab_id,
-                                               bool force_disk_read);
+  scoped_refptr<ThumbnailLayer> GetOrCreateStaticLayer(int tab_id,
+                                                       bool force_disk_read);
 
   // Should be called when a tab gets a new live layer that should be served
   // by the cache to the CompositorView.
   void AttachLiveLayer(int tab_id, scoped_refptr<cc::Layer> layer);
 
   // Should be called when a tab removes a live layer because it should no
   // longer be served by the CompositorView.  If |layer| is NULL, will
   // make sure all live layers are detached.
   void DetachLiveLayer(int tab_id, scoped_refptr<cc::Layer> layer);
 
@@ skipping 51 matching lines @@
   base::WeakPtrFactory<TabContentManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContentManager);
 };
 
 bool RegisterTabContentManager(JNIEnv* env);
 
 }  // namespace android
 
 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_TAB_CONTENT_MANAGER_H_