Remove references to DOMUIContents. It looks like the class doesn't exist.

chrome/browser/tab_contents/tab_contents.h

 // Copyright (c) 2009 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_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 
 #include "build/build_config.h"
 
 #include <map>
@@ skipping 54 matching lines @@
 struct WebApplicationInfo;
 }
 
 namespace IPC {
 class Message;
 }
 
 class AutofillManager;
 class BlockedPopupContainer;
 class DOMUI;
-class DOMUIContents;
 class DownloadItem;
 class LoadNotificationDetails;
 class OmniboxSearchHint;
 class PageAction;
 class PasswordManager;
 class PluginInstaller;
 class Profile;
 struct RendererPreferences;
 class RenderViewHost;
 class TabContentsDelegate;
@@ skipping 42 matching lines @@
   static void RegisterUserPrefs(PrefService* prefs);
 
   // Intrinsic tab state -------------------------------------------------------
 
   // Returns the property bag for this tab contents, where callers can add
   // extra data they may wish to associate with the tab. Returns a pointer
   // rather than a reference since the PropertyAccessors expect this.
   const PropertyBag* property_bag() const { return &property_bag_; }
   PropertyBag* property_bag() { return &property_bag_; }
 
-  // Returns this object as a DOMUIContents if it is one, and NULL otherwise.
-  virtual DOMUIContents* AsDOMUIContents() { return NULL; }
-
   TabContentsDelegate* delegate() const { return delegate_; }
   void set_delegate(TabContentsDelegate* d) { delegate_ = d; }
 
   // Gets the controller for this tab contents.
   NavigationController& controller() { return controller_; }
   const NavigationController& controller() const { return controller_; }
 
   // Returns the user profile associated with this TabContents (via the
   // NavigationController).
   Profile* profile() const { return controller_.profile(); }
@@ skipping 1012 matching lines @@
 
   // The time that we started to create the new tab page.
   base::TimeTicks new_tab_start_time_;
 
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_