Don't use base::MessageLoop::{Quit,QuitClosure} in chrome/

chrome/browser/sync/glue/sync_backend_host_impl_unittest.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/sync_backend_host_impl.h"
 
 #include <cstddef>
 
 #include "base/files/file_util.h"
 #include "base/location.h"
@@ skipping 52 matching lines @@
 const char kTestProfileName[] = "test-profile";
 
 static const base::FilePath::CharType kTestSyncDir[] =
     FILE_PATH_LITERAL("sync-test");
 
 ACTION_P(Signal, event) {
   event->Signal();
 }
 
 void QuitMessageLoop() {
-  base::MessageLoop::current()->Quit();
+  base::MessageLoop::current()->QuitWhenIdle();
 }
 
 class MockSyncFrontend : public sync_driver::SyncFrontend {
  public:
   virtual ~MockSyncFrontend() {}
 
   MOCK_METHOD4(
       OnBackendInitialized,
       void(const syncer::WeakHandle<syncer::JsBackend>&,
            const syncer::WeakHandle<syncer::DataTypeDebugInfoListener>&,
@@ skipping 183 matching lines @@
 
     content::NotificationService::current()->Notify(
         chrome::NOTIFICATION_SYNC_REFRESH_LOCAL,
         content::Source<Profile>(profile_),
         content::Details<syncer::ModelTypeSet>(&types));
   }
 
  protected:
   void DownloadReady(syncer::ModelTypeSet succeeded_types,
                      syncer::ModelTypeSet failed_types) {
-    base::MessageLoop::current()->Quit();
+    base::MessageLoop::current()->QuitWhenIdle();
   }
 
   void OnDownloadRetry() {
     NOTIMPLEMENTED();
   }
 
   content::TestBrowserThreadBundle thread_bundle_;
   StrictMock<MockSyncFrontend> mock_frontend_;
   syncer::SyncCredentials credentials_;
   TestingProfileManager profile_manager_;
@@ skipping 577 matching lines @@
   EXPECT_EQ(invalidation_versions.size(),
             persisted_invalidation_versions.size());
   for (auto iter : persisted_invalidation_versions) {
     EXPECT_EQ(invalidation_versions[iter.first], iter.second);
   }
 }
 
 }  // namespace
 
 }  // namespace browser_sync