Move Sad Tab implementation out of the TabContentsViews.

content/browser/tab_contents/tab_contents_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 CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_OBSERVER_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_OBSERVER_H_
 
+#include "base/process_util.h"
 #include "content/browser/tab_contents/navigation_controller.h"
 #include "content/common/content_export.h"
 #include "content/public/common/page_transition_types.h"
 #include "ipc/ipc_channel.h"
 #include "webkit/glue/window_open_disposition.h"
 
 class RenderViewHost;
 struct ViewHostMsg_FrameNavigate_Params;
 
 // An observer API implemented by classes which are interested in various page
 // load events from TabContents.  They also get a chance to filter IPC messages.
 class CONTENT_EXPORT TabContentsObserver : public IPC::Channel::Listener,
                                            public IPC::Message::Sender {
  public:
   virtual void RenderViewCreated(RenderViewHost* render_view_host);
   virtual void RenderViewDeleted(RenderViewHost* render_view_host);
   virtual void RenderViewReady();
-  virtual void RenderViewGone();
+  virtual void RenderViewGone(base::TerminationStatus status);
   virtual void NavigateToPendingEntry(
       const GURL& url,
       NavigationController::ReloadType reload_type);
   virtual void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
       const ViewHostMsg_FrameNavigate_Params& params);
   virtual void DidNavigateAnyFrame(
       const content::LoadCommittedDetails& details,
       const ViewHostMsg_FrameNavigate_Params& params);
   // |render_view_host| is the RenderViewHost for which the provisional load is
@@ skipping 90 matching lines @@
   // Invoked from TabContents. Invokes TabContentsDestroyed and NULL out
   // |tab_contents_|.
   void TabContentsDestroyed();
 
   TabContents* tab_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContentsObserver);
 };
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_OBSERVER_H_