Move most of the remaining users of WebContentsObserver::tab_contents() to use web_contents().

chrome/browser/ui/views/sad_tab_view.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_VIEWS_SAD_TAB_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_SAD_TAB_VIEW_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/link_listener.h"
 #include "ui/views/view.h"
 
-class TabContents;
+namespace content {
+class WebContents;
+}
 
 namespace gfx {
 class Font;
 }
 
 namespace views {
 class Label;
 class TextButton;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 //
 // SadTabView
 //
 //  A views::View subclass used to render the presentation of the crashed
 //  "sad tab" in the browser window when a renderer is destroyed unnaturally.
 //
 ///////////////////////////////////////////////////////////////////////////////
 class SadTabView : public views::View,
                    public views::LinkListener,
                    public views::ButtonListener {
  public:
   // NOTE: Do not remove or reorder the elements in this enum, and only add new
   // items at the end. We depend on these specific values in a histogram.
   enum Kind {
     CRASHED = 0,  // Tab crashed.  Display the "Aw, Snap!" page.
     KILLED        // Tab killed.  Display the "He's dead, Jim!" tab page.
   };
 
-  SadTabView(TabContents* tab_contents, Kind kind);
+  SadTabView(content::WebContents* web_contents, Kind kind);
   virtual ~SadTabView();
 
   // Overridden from views::View:
   virtual void Layout() OVERRIDE;
 
   // Overridden from views::LinkListener:
   virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
 
   // Overridden from views::ButtonListener:
   virtual void ButtonPressed(views::Button* source,
                              const views::Event& event) OVERRIDE;
 
  protected:
   // Overridden from views::View:
   virtual void ViewHierarchyChanged(bool is_add,
                                     views::View* parent,
                                     views::View* child) OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
 
  private:
   views::Label* CreateLabel(const string16& text);
   views::Link* CreateLink(const string16& text);
 
-  TabContents* tab_contents_;
+  content::WebContents* web_contents_;
   Kind kind_;
   bool painted_;
   const gfx::Font& base_font_;
   views::Label* message_;
   views::Link* help_link_;
   views::Link* feedback_link_;
   views::TextButton* reload_button_;
 
   DISALLOW_COPY_AND_ASSIGN(SadTabView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_SAD_TAB_VIEW_H__