Decode ImageManager cached images on demand.

chrome/browser/search/suggestions/suggestions_service_factory.cc

Index: chrome/browser/search/suggestions/suggestions_service_factory.cc
diff --git a/chrome/browser/search/suggestions/suggestions_service_factory.cc b/chrome/browser/search/suggestions/suggestions_service_factory.cc
index a1e2982b35da7788d487e4506e0dac5d6d5f42bf..77002ad2d7290f3973f24a9efeb807faf97b598c 100644
--- a/chrome/browser/search/suggestions/suggestions_service_factory.cc
+++ b/chrome/browser/search/suggestions/suggestions_service_factory.cc
@@ -67,7 +67,9 @@ KeyedService* SuggestionsServiceFactory::BuildServiceInstanceFor(
   scoped_ptr<ImageFetcherImpl> image_fetcher(
       new ImageFetcherImpl(the_profile->GetRequestContext()));
   scoped_ptr<ImageManager> thumbnail_manager(
-      new ImageManager(image_fetcher.Pass(), db.Pass(), database_dir));
+      new ImageManager(
+          image_fetcher.Pass(), db.Pass(), database_dir,
+          BrowserThread::GetMessageLoopProxyForThread(BrowserThread::DB)));
   return new SuggestionsService(
       the_profile->GetRequestContext(), suggestions_store.Pass(),
       thumbnail_manager.Pass(), blacklist_store.Pass());