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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_UI_SAD_TAB_HELPER_H_
      6 #define CHROME_BROWSER_UI_SAD_TAB_HELPER_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/compiler_specific.h"
     10 #include "base/memory/scoped_ptr.h"
     11 #include "content/public/browser/web_contents_observer.h"
     12 #include "content/public/browser/web_contents_user_data.h"
     13 
     14 namespace chrome {
     15 class SadTab;
     16 }
     17 
     18 // Per-tab class to manage sad tab views.
     19 class SadTabHelper : public content::WebContentsObserver,
     20                      public content::WebContentsUserData<SadTabHelper> {
     21  public:
     22   virtual ~SadTabHelper();
     23 
     24   chrome::SadTab* sad_tab() { return sad_tab_.get(); }
     25 
     26  private:
     27   friend class content::WebContentsUserData<SadTabHelper>;
     28 
     29   explicit SadTabHelper(content::WebContents* web_contents);
     30 
     31   void InstallSadTab(base::TerminationStatus status);
     32 
     33   // Overridden from content::WebContentsObserver:
     34   virtual void RenderViewReady() OVERRIDE;
     35   virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE;
     36 
     37   scoped_ptr<chrome::SadTab> sad_tab_;
     38 
     39   DISALLOW_COPY_AND_ASSIGN(SadTabHelper);
     40 };
     41 
     42 #endif  // CHROME_BROWSER_UI_SAD_TAB_HELPER_H_
     43