Provide assumed favicon for intents if service provider page was never visited.

chrome/browser/history/history.cc

 // Copyright (c) 2011 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.
 
 // The history system runs on a background thread so that potentially slow
 // database operations don't delay the browser. This backend processing is
 // represented by HistoryBackend. The HistoryService's job is to dispatch to
 // that thread.
 //
 // Main thread                       History thread
@@ skipping 479 matching lines @@
       page_url, icon_url,
       scoped_refptr<RefCountedMemory>(new RefCountedBytes(image_data)),
       icon_type);
 }
 
 void HistoryService::SetFaviconOutOfDateForPage(const GURL& page_url) {
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::SetFaviconOutOfDateForPage, page_url);
 }
 
+void HistoryService::CloneFavicon(const GURL& old_page_url,
+                                  const GURL& new_page_url) {
+  ScheduleAndForget(PRIORITY_NORMAL, &HistoryBackend::CloneFavicon,
+                    old_page_url, new_page_url);
+}
+
 void HistoryService::SetImportedFavicons(
     const std::vector<history::ImportedFaviconUsage>& favicon_usage) {
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::SetImportedFavicons, favicon_usage);
 }
 
 void HistoryService::IterateURLs(URLEnumerator* enumerator) {
   ScheduleAndForget(PRIORITY_NORMAL, &HistoryBackend::IterateURLs, enumerator);
 }
 
@@ skipping 334 matching lines @@
     history::TopSites* ts = profile_->GetTopSitesWithoutCreating();
     if (ts)
       ts->MigrateFromHistory();
   }
 }
 
 void HistoryService::OnTopSitesReady() {
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::MigrateThumbnailsDatabase);
 }