TabContentsWrapper -> TabContents, part 1.

chrome/browser/ui/pdf/pdf_tab_observer.h

 // Copyright (c) 2011 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_UI_PDF_PDF_TAB_OBSERVER_H_
 #define CHROME_BROWSER_UI_PDF_PDF_TAB_OBSERVER_H_
 #pragma once
 
 #include "content/public/browser/web_contents_observer.h"
 
-class TabContentsWrapper;
+class TabContents;
+typedef TabContents TabContentsWrapper;
 
 // Per-tab class to handle PDF messages.
 class PDFTabObserver : public content::WebContentsObserver {
  public:
   explicit PDFTabObserver(TabContentsWrapper* wrapper);
   virtual ~PDFTabObserver();
 
  private:
   // content::WebContentsObserver overrides:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   // Internal helpers ----------------------------------------------------------
 
   // Message handlers.
   void OnPDFHasUnsupportedFeature();
 
   // Our owning TabContentsWrapper.
   TabContentsWrapper* wrapper_;
 
   DISALLOW_COPY_AND_ASSIGN(PDFTabObserver);
 };
 
 #endif  // CHROME_BROWSER_UI_PDF_PDF_TAB_OBSERVER_H_