[SyncFS] Inhibit change report throttling on test

chrome/browser/sync_file_system/local/local_file_sync_service.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_file_system/local/local_file_sync_service.h"
 
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/thread_task_runner_handle.h"
 #include "chrome/browser/extensions/extension_util.h"
@@ skipping 95 matching lines @@
 // LocalFileSyncService -------------------------------------------------------
 
 scoped_ptr<LocalFileSyncService> LocalFileSyncService::Create(
     Profile* profile) {
   return make_scoped_ptr(new LocalFileSyncService(profile, NULL));
 }
 
 scoped_ptr<LocalFileSyncService> LocalFileSyncService::CreateForTesting(
     Profile* profile,
     leveldb::Env* env) {
-  return make_scoped_ptr(new LocalFileSyncService(profile, env));
+  scoped_ptr<LocalFileSyncService> sync_service(
+      new LocalFileSyncService(profile, env));
+  sync_service->sync_context_->set_mock_notify_changes_duration_in_sec(0);
+  return sync_service.Pass();
 }
 
 LocalFileSyncService::~LocalFileSyncService() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 }
 
 void LocalFileSyncService::Shutdown() {
   sync_context_->RemoveOriginChangeObserver(this);
   sync_context_->ShutdownOnUIThread();
   profile_ = NULL;
@@ skipping 373 matching lines @@
 
 LocalChangeProcessor* LocalFileSyncService::GetLocalChangeProcessor(
     const FileSystemURL& url) {
   if (!get_local_change_processor_.is_null())
     return get_local_change_processor_.Run(url.origin());
   DCHECK(local_change_processor_);
   return local_change_processor_;
 }
 
 }  // namespace sync_file_system