Drive: Mount/Unmount GoogleDrive on Files App when the file system is mounted/unmounted.

chrome/browser/chromeos/gdata/gdata_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/gdata/gdata_system_service.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/gdata/drive_webapps_registry.h"
@@ skipping 97 matching lines @@
     return;
 
   const FilePath mount_point = gdata::util::GetGDataMountPointPath();
   fileapi::ExternalFileSystemMountPointProvider* provider =
       BrowserContext::GetFileSystemContext(profile_)->external_provider();
   if (provider && !provider->HasMountPoint(mount_point)) {
     provider->AddRemoteMountPoint(
         mount_point,
         new GDataFileSystemProxy(file_system_.get()));
   }
+
+  file_system_->Initialize();
+  file_system_->NotifyFileSystemMounted();
 }
 
 void GDataSystemService::RemoveDriveMountPoint() {
+  file_system_->NotifyFileSystemToBeUnmounted();
+  file_system_->StopUpdates();
+
   const FilePath mount_point = gdata::util::GetGDataMountPointPath();
   fileapi::ExternalFileSystemMountPointProvider* provider =
       BrowserContext::GetFileSystemContext(profile_)->external_provider();
   if (provider && provider->HasMountPoint(mount_point))
     provider->RemoveMountPoint(mount_point);
 }
 
 //===================== GDataSystemServiceFactory =============================
 
 // static
@@ skipping 53 matching lines @@
       g_test_cache_root ? FilePath(*g_test_cache_root) :
                           GDataCache::GetCacheRootPath(profile);
   delete g_test_cache_root;
   g_test_cache_root = NULL;
 
   service->Initialize(documents_service, cache_root);
   return service;
 }
 
 }  // namespace gdata