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

chrome/browser/extensions/favicon_downloader.h

 // Copyright 2013 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_EXTENSIONS_FAVICON_DOWNLOADER_H_
 #define CHROME_BROWSER_EXTENSIONS_FAVICON_DOWNLOADER_H_
 
 #include <map>
 #include <set>
 #include <vector>
@@ skipping 51 matching lines @@
                           int http_status_code,
                           const GURL& image_url,
                           const std::vector<SkBitmap>& bitmaps,
                           const std::vector<gfx::Size>& original_bitmap_sizes);
 
   // content::WebContentsObserver overrides:
   virtual void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) OVERRIDE;
   virtual void DidUpdateFaviconURL(
-      int32 page_id,
       const std::vector<content::FaviconURL>& candidates) OVERRIDE;
 
   // Whether we have received favicons from the renderer.
   bool got_favicon_urls_;
 
   // URLs that aren't given by WebContentsObserver::DidUpdateFaviconURL() that
   // should be used for this favicon. This is necessary in order to get touch
   // icons on non-android environments.
   std::vector<GURL> extra_favicon_urls_;
 
   // The icons which were downloaded. Populated by FetchIcons().
   FaviconMap favicon_map_;
 
   // Request ids of in-progress requests.
   std::set<int> in_progress_requests_;
 
   // Urls for which a download has already been initiated. Used to prevent
   // duplicate downloads of the same url.
   std::set<GURL> processed_urls_;
 
   // Callback to run on favicon download completion.
   FaviconDownloaderCallback callback_;
 
   base::WeakPtrFactory<FaviconDownloader> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FaviconDownloader);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_FAVICON_DOWNLOADER_H_