TabContentsWrapper -> TabContents, part 1.

chrome/browser/extensions/api/offscreen_tabs/offscreen_tabs_api.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 CHROME_BROWSER_EXTENSIONS_API_OFFSCREEN_TABS_OFFSCREEN_TABS_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_OFFSCREEN_TABS_OFFSCREEN_TABS_API_H_
 #pragma once
 
 #include <string>
 
@@ skipping 10 matching lines @@
 // those in tabs, there are a few key differences that need to be resolved.
 //  - Offscreen tabs are invisible (maybe this could be a property on Tab).
 //  - The lifetime of an offscreen tab is tied to the parent tab that opened
 //    it. We do this to prevent leaking these tabs, since users wouldn't have
 //    a way of directly closing them or knowing they're open.
 //  - Offscreen tabs have a width and height, while regular tabs don't. This
 //    lets clients control the dimensions of the images in ToDataUrl.
 
 class BackingStore;
 class SkBitmap;
-class TabContentsWrapper;
+class TabContents;
+typedef TabContents TabContentsWrapper;
 namespace content {
 class WebContents;
 }  // namespace content
 
 // Creates an offscreen tab.
 class CreateOffscreenTabFunction : public SyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.create")
 
   CreateOffscreenTabFunction();
@@ skipping 131 matching lines @@
   virtual bool RunImpl() OVERRIDE;
 
   // UpdateTabFunction:
   virtual void PopulateResult() OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(UpdateOffscreenTabFunction);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_OFFSCREEN_TABS_OFFSCREEN_TABS_API_H_