Move encoding SkBitmaps to PNG out of FaviconService::SetFavicons() and onto the history thread

chrome/browser/history/history_service.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.
 
 // 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 602 matching lines @@
   if (!CanAddURL(page_url))
     return;
 
   ScheduleAndForget(PRIORITY_NORMAL, &HistoryBackend::MergeFavicon, page_url,
                     icon_url, icon_type, bitmap_data, pixel_size);
 }
 
 void HistoryService::SetFavicons(
     const GURL& page_url,
     favicon_base::IconType icon_type,
-    const std::vector<favicon_base::FaviconRawBitmapData>&
-        favicon_bitmap_data) {
+    const GURL& icon_url,
+    const std::vector<SkBitmap>& bitmaps) {
   DCHECK(thread_) << "History service being called after cleanup";
   DCHECK(thread_checker_.CalledOnValidThread());
   if (!CanAddURL(page_url))
     return;
 
   ScheduleAndForget(PRIORITY_NORMAL, &HistoryBackend::SetFavicons, page_url,
-      icon_type, favicon_bitmap_data);
+      icon_type, icon_url, bitmaps);
 }
 
 void HistoryService::SetFaviconsOutOfDateForPage(const GURL& page_url) {
   DCHECK(thread_) << "History service being called after cleanup";
   DCHECK(thread_checker_.CalledOnValidThread());
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::SetFaviconsOutOfDateForPage, page_url);
 }
 
 void HistoryService::CloneFavicons(const GURL& old_page_url,
@@ skipping 582 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   visit_database_observers_.RemoveObserver(observer);
 }
 
 void HistoryService::NotifyVisitDBObserversOnAddVisit(
     const history::BriefVisitInfo& info) {
   DCHECK(thread_checker_.CalledOnValidThread());
   FOR_EACH_OBSERVER(history::VisitDatabaseObserver, visit_database_observers_,
                     OnAddVisit(info));
 }