Hook up Autofill Backend interface to SyncableServices

components/webdata/common/web_data_service_backend.cc

Index: components/webdata/common/web_data_service_backend.cc
diff --git a/components/webdata/common/web_data_service_backend.cc b/components/webdata/common/web_data_service_backend.cc
index 3b945b0b540f721304917c9d135b52a16689f890..e5f8b5fc424d1ebf35b220224687301c3cb2cfc8 100644
--- a/components/webdata/common/web_data_service_backend.cc
+++ b/components/webdata/common/web_data_service_backend.cc
@@ -92,6 +92,15 @@ void WebDataServiceBackend::DBReadTaskWrapper(
   request_manager_->RequestCompleted(request.Pass());
 }
 
+void WebDataServiceBackend::GetDatabaseAsync(
+    const WebDatabaseService::DBCallback& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
+  if (!db_ || init_status_ != sql::INIT_OK)
+    callback.Run(base::WeakPtr<WebDatabase>());
+  else
+    callback.Run(db_->AsWeakPtr());
+}
+
 WebDataServiceBackend::~WebDataServiceBackend() {
   ShutdownDatabase(false);
 }