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

chrome/browser/extensions/favicon_downloader_unittest.cc

 // 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.
 
 #include "chrome/browser/extensions/favicon_downloader.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
 #include "content/public/common/favicon_url.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 69 matching lines @@
 
   void CompleteImageDownload(
       int id,
       const GURL& image_url,
       const std::vector<gfx::Size>& original_bitmap_sizes) {
     FaviconDownloader::DidDownloadFavicon(id, 200, image_url,
         CreateTestBitmaps(original_bitmap_sizes), original_bitmap_sizes);
   }
 
   void UpdateFaviconURLs(const std::vector<content::FaviconURL>& candidates) {
-    FaviconDownloader::DidUpdateFaviconURL(0, candidates);
+    FaviconDownloader::DidUpdateFaviconURL(candidates);
   }
 
   void set_initial_favicon_urls(const std::vector<content::FaviconURL>& urls) {
     initial_favicon_urls_ = urls;
   }
 
  private:
   std::vector<content::FaviconURL> initial_favicon_urls_;
   FaviconDownloader::FaviconMap favicon_map_;
   int id_counter_;
@@ skipping 83 matching lines @@
   // Only 1 download should have been initiated for |empty_favicon| even though
   // the URL was in both the web app info and the favicon urls.
   downloader.CompleteImageDownload(2, empty_favicon, std::vector<gfx::Size>());
   EXPECT_EQ(0u, downloader.pending_requests());
 
   EXPECT_EQ(3u, downloader.favicon_map().size());
   EXPECT_EQ(0u, downloader.favicon_map()[empty_favicon].size());
   EXPECT_EQ(1u, downloader.favicon_map()[favicon_url_1].size());
   EXPECT_EQ(2u, downloader.favicon_map()[favicon_url_2].size());
 }