Hook up Autofill Backend interface to SyncableServices

components/webdata/common/web_database_service.cc

Index: components/webdata/common/web_database_service.cc
diff --git a/components/webdata/common/web_database_service.cc b/components/webdata/common/web_database_service.cc
index da5517bf480dd4119f5d41b772fe0ce470a336cf..4604dc2d2703586dc694fc28bf63a701488a914f 100644
--- a/components/webdata/common/web_database_service.cc
+++ b/components/webdata/common/web_database_service.cc
@@ -84,11 +84,10 @@ void WebDatabaseService::ShutdownDatabase() {
            wds_backend_, false));
 }
 
-WebDatabase* WebDatabaseService::GetDatabaseOnDB() const {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
-  if (!wds_backend_)
-    return NULL;
-  return wds_backend_->database();
+void WebDatabaseService::GetDatabaseOnDB(const DBCallback& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  BrowserThread::PostTask(BrowserThread::DB, FROM_HERE,
+      Bind(&WebDataServiceBackend::GetDatabaseAsync, wds_backend_, callback));
 }
 
 void WebDatabaseService::ScheduleDBTask(