Remove TextDatabase from the history service.

chrome/browser/history/history_tab_helper.h

 // Copyright (c) 2012 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_HISTORY_HISTORY_TAB_HELPER_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_TAB_HELPER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "content/public/browser/notification_observer.h"
@@ skipping 28 matching lines @@
       const GURL& virtual_url,
       base::Time timestamp,
       bool did_replace_entry,
       const content::FrameNavigateParams& params);
 
  private:
   explicit HistoryTabHelper(content::WebContents* web_contents);
   friend class content::WebContentsUserData<HistoryTabHelper>;
 
   // content::WebContentsObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) OVERRIDE;
   virtual void DidNavigateAnyFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) OVERRIDE;
   virtual void WebContentsDestroyed(content::WebContents* tab) OVERRIDE;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
@@ skipping 12 matching lines @@
   // prevents some weirdness because some AJAXy apps use titles for status
   // messages.
   bool received_page_title_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryTabHelper);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_TAB_HELPER_H_