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

chrome/browser/ui/metro_pin_tab_helper_win.cc

 // 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.
 
 #include "chrome/browser/ui/metro_pin_tab_helper_win.h"
 
 #include <set>
 
 #include "base/base_paths.h"
 #include "base/bind.h"
@@ skipping 401 matching lines @@
     const content::FrameNavigateParams& /*params*/) {
   // Cancel any outstanding pin operations once the user navigates away from
   // the page.
   if (favicon_chooser_.get())
     favicon_chooser_.reset();
   // Any candidate favicons we have are now out of date so clear them.
   favicon_url_candidates_.clear();
 }
 
 void MetroPinTabHelper::DidUpdateFaviconURL(
-    int32 page_id,
     const std::vector<content::FaviconURL>& candidates) {
   favicon_url_candidates_ = candidates;
 }
 
 void MetroPinTabHelper::DidDownloadFavicon(
     int id,
     int http_status_code,
     const GURL& image_url,
     const std::vector<SkBitmap>& bitmaps,
     const std::vector<gfx::Size>& original_bitmap_sizes) {
@@ skipping 17 matching lines @@
 
   GURL url = web_contents()->GetURL();
   base::string16 tile_id = GenerateTileId(base::UTF8ToUTF16(url.spec()));
   metro_un_pin_from_start_screen(tile_id,
                                  base::Bind(&PinPageReportUmaCallback));
 }
 
 void MetroPinTabHelper::FaviconDownloaderFinished() {
   favicon_chooser_.reset();
 }