Remove page IDs from three WebContentsObserver APIs that don't need it.

chrome/browser/favicon/favicon_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_FAVICON_FAVICON_TAB_HELPER_H_
 #define CHROME_BROWSER_FAVICON_FAVICON_TAB_HELPER_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 44 matching lines @@
 
   // Returns the current tab's favicon urls. If this is empty,
   // DidUpdateFaviconURL has not yet been called for the current navigation.
   const std::vector<content::FaviconURL>& favicon_urls() const {
     return favicon_urls_;
   }
 
   // content::WebContentsObserver override. Must be public, because also
   // called from PrerenderContents.
   virtual void DidUpdateFaviconURL(
-      int32 page_id,
       const std::vector<content::FaviconURL>& candidates) OVERRIDE;
 
   // Saves the favicon for the current page.
   void SaveFavicon();
 
   // FaviconDriver methods.
   virtual content::NavigationEntry* GetActiveEntry() OVERRIDE;
   virtual int StartDownload(const GURL& url, int max_bitmap_size) OVERRIDE;
   virtual void NotifyFaviconUpdated(bool icon_url_changed) OVERRIDE;
   virtual bool IsOffTheRecord() OVERRIDE;
@@ skipping 29 matching lines @@
   scoped_ptr<FaviconHandler> favicon_handler_;
 
   // Handles downloading touchicons. It is NULL if
   // browser_defaults::kEnableTouchIcon is false.
   scoped_ptr<FaviconHandler> touch_icon_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(FaviconTabHelper);
 };
 
 #endif  // CHROME_BROWSER_FAVICON_FAVICON_TAB_HELPER_H_