chromeos: Disable Drive metadata prefetch

chrome/browser/chromeos/drive/drive_system_service.cc

 // Copyright (c) 2012 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/chromeos/drive/drive_system_service.h"
 
 #include "base/bind.h"
+#include "base/command_line.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/drive/drive_api_service.h"
 #include "chrome/browser/chromeos/drive/drive_download_observer.h"
 #include "chrome/browser/chromeos/drive/drive_file_system.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_proxy.h"
 #include "chrome/browser/chromeos/drive/drive_file_system_util.h"
 #include "chrome/browser/chromeos/drive/drive_prefetcher.h"
 #include "chrome/browser/chromeos/drive/drive_sync_client.h"
 #include "chrome/browser/chromeos/drive/drive_webapps_registry.h"
 #include "chrome/browser/chromeos/drive/event_logger.h"
 #include "chrome/browser/chromeos/drive/file_write_helper.h"
 #include "chrome/browser/chromeos/drive/stale_cache_files_remover.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/google_apis/drive_api_util.h"
 #include "chrome/browser/google_apis/drive_uploader.h"
 #include "chrome/browser/google_apis/gdata_wapi_service.h"
 #include "chrome/browser/google_apis/gdata_wapi_url_generator.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/storage_partition.h"
 #include "google/cacheinvalidation/types.pb.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_mount_point_provider.h"
 #include "webkit/user_agent/user_agent_util.h"
 
@@ skipping 274 matching lines @@
         kDriveInvalidationObjectId));
     profile_sync_service->UpdateRegisteredInvalidationIds(this, ids);
     push_notification_registered_ = true;
     file_system_->SetPushNotificationEnabled(
         profile_sync_service->GetInvalidatorState() ==
         syncer::INVALIDATIONS_ENABLED);
   }
 
   AddDriveMountPoint();
 
-  // Start prefetching of Drive metadata.
-  file_system_->StartInitialFeedFetch();
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableDriveMetadataPrefetch)) {
+    // Start prefetching of Drive metadata.
+    file_system_->StartInitialFeedFetch();
+  }
 }
 
 void DriveSystemService::DisableDrive() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   drive_disabled_ = true;
   // Change the download directory to the default value if the download
   // destination is set to under Drive mount point.
   PrefService* pref_service = profile_->GetPrefs();
   if (util::IsUnderDriveMountPoint(
@@ skipping 66 matching lines @@
   if (factory_for_test_.is_null())
     service = new DriveSystemService(profile, NULL, FilePath(), NULL);
   else
     service = factory_for_test_.Run(profile);
 
   service->Initialize();
   return service;
 }
 
 }  // namespace drive