Add SwappedOut to TabContentsDelegate to allow us to correctly delete TabContents.

content/browser/tab_contents/tab_contents.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_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 626 matching lines @@
                            int32 page_id,
                            const std::string& state) OVERRIDE;
   virtual void UpdateTitle(RenderViewHost* render_view_host,
                            int32 page_id,
                            const string16& title,
                            base::i18n::TextDirection title_direction) OVERRIDE;
   virtual void UpdateEncoding(RenderViewHost* render_view_host,
                               const std::string& encoding) OVERRIDE;
   virtual void UpdateTargetURL(int32 page_id, const GURL& url) OVERRIDE;
   virtual void Close(RenderViewHost* render_view_host) OVERRIDE;
+  virtual void SwappedOut(RenderViewHost* render_view_host) OVERRIDE;
   virtual void RequestMove(const gfx::Rect& new_bounds) OVERRIDE;
   virtual void DidStartLoading() OVERRIDE;
   virtual void DidStopLoading() OVERRIDE;
   virtual void DidCancelLoading() OVERRIDE;
   virtual void DidChangeLoadProgress(double progress) OVERRIDE;
   virtual void DocumentOnLoadCompletedInMainFrame(
       RenderViewHost* render_view_host,
       int32 page_id) OVERRIDE;
   virtual void RequestOpenURL(const GURL& url,
                               const GURL& referrer,
@@ skipping 210 matching lines @@
   // (full-page plugins for now only) permissions.
   int content_restrictions_;
 
   // Our view type. Default is VIEW_TYPE_TAB_CONTENTS.
   content::ViewType view_type_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_