Remove "Show saved copy" button from error page

chrome/browser/android/tab_android.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_ANDROID_TAB_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 
 #include <jni.h>
 #include <stdint.h>
 
@@ skipping 104 matching lines @@
 
   void SetWindowSessionID(SessionID::id_type window_id);
   void SetSyncId(int sync_id);
 
   void HandlePopupNavigation(chrome::NavigateParams* params);
 
   bool HasPrerenderedUrl(GURL gurl);
 
   bool HasOfflinePages() const;
   void ShowOfflinePages();
-  void LoadOfflineCopy(const GURL& url);
 
   // Notifies this TabAndroid that a Lo-Fi response has been received. The
   // TabAndroid then handles showing Lo-Fi UI if this is the first Lo-Fi
   // response for a page load. |is_preview| indicates whether the response was a
   // Lo-Fi preview response.
   void OnLoFiResponseReceived(bool is_preview);
 
   // Overridden from CoreTabHelperDelegate:
   void SwapTabContents(content::WebContents* old_contents,
                        content::WebContents* new_contents,
@@ skipping 124 matching lines @@
   bool HasPrerenderedUrl(JNIEnv* env,
                          const base::android::JavaParamRef<jobject>& obj,
                          const base::android::JavaParamRef<jstring>& url);
 
   // Register the Tab's native methods through JNI.
   static bool RegisterTabAndroid(JNIEnv* env);
 
  private:
   prerender::PrerenderManager* GetPrerenderManager() const;
 
-  int64_t GetBookmarkIdHelper(bool only_editable) const;
-
   JavaObjectWeakGlobalRef weak_java_tab_;
 
   // The identifier used by session restore for this tab.
   SessionID session_tab_id_;
 
   // Identifier of the window the tab is in.
   SessionID session_window_id_;
 
   content::NotificationRegistrar notification_registrar_;
 
   scoped_refptr<cc::Layer> content_layer_;
   chrome::android::TabContentManager* tab_content_manager_;
 
   scoped_ptr<content::WebContents> web_contents_;
   scoped_ptr<chrome::android::TabWebContentsDelegateAndroid>
       web_contents_delegate_;
 
   scoped_ptr<browser_sync::SyncedTabDelegateAndroid> synced_tab_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(TabAndroid);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_TAB_ANDROID_H_