[Sync] Add support for server-controlled favicon sync limit

chrome/browser/sync/glue/favicon_cache.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/sync/glue/favicon_cache.h"
 
 #include "base/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "chrome/browser/favicon/favicon_service.h"
 #include "chrome/browser/favicon/favicon_service_factory.h"
@@ skipping 207 matching lines @@
 FaviconCacheObserver::~FaviconCacheObserver() {}
 
 FaviconCache::FaviconCache(Profile* profile, int max_sync_favicon_limit)
     : profile_(profile),
       weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
       legacy_delegate_(NULL),
       max_sync_favicon_limit_(max_sync_favicon_limit) {
   notification_registrar_.Add(this,
                               chrome::NOTIFICATION_HISTORY_URLS_DELETED,
                               content::Source<Profile>(profile_));
+  DVLOG(1) << "Setting favicon limit to " << max_sync_favicon_limit;
 }
 
 FaviconCache::~FaviconCache() {}
 
 syncer::SyncMergeResult FaviconCache::MergeDataAndStartSyncing(
     syncer::ModelType type,
     const syncer::SyncDataList& initial_sync_data,
     scoped_ptr<syncer::SyncChangeProcessor> sync_processor,
     scoped_ptr<syncer::SyncErrorFactory> error_handler) {
   DCHECK(type == syncer::FAVICON_IMAGES || type == syncer::FAVICON_TRACKING);
@@ skipping 750 matching lines @@
 
 size_t FaviconCache::NumFaviconsForTest() const {
   return synced_favicons_.size();
 }
 
 size_t FaviconCache::NumTasksForTest() const {
   return page_task_map_.size();
 }
 
 }  // namespace browser_sync