gdata: Support mouting archive file in GData cache

chrome/browser/chromeos/extensions/file_browser_event_router.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/extensions/file_browser_event_router.h"
 
 #include "base/bind.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop.h"
 #include "base/stl_util.h"
@@ skipping 396 matching lines @@
 void FileBrowserEventRouter::OnDiskAdded(
     const DiskMountManager::Disk* disk) {
   VLOG(1) << "Disk added: " << disk->device_path();
   if (disk->device_path().empty()) {
     VLOG(1) << "Empty system path for " << disk->device_path();
     return;
   }
 
   // If disk is not mounted yet and it has media, give it a try.
   if (disk->mount_path().empty() && disk->has_media()) {
-    // Initiate disk mount operation.
+    // Initiate disk mount operation. Here MountPath auto-detects the
+    // filesystem format if the second argument is empty.
     DiskMountManager::GetInstance()->MountPath(
-        disk->device_path(), chromeos::MOUNT_TYPE_DEVICE);
+        disk->device_path(), std::string(), chromeos::MOUNT_TYPE_DEVICE);
   } else {
     // Either the disk was mounted or it has no media. In both cases we don't
     // want the Scanning notification to persist.
     notifications_->HideNotification(FileBrowserNotifications::DEVICE,
                                      disk->system_path_prefix());
   }
   DispatchDiskEvent(disk, true);
 }
 
 void FileBrowserEventRouter::OnDiskRemoved(
@@ skipping 45 matching lines @@
 void FileBrowserEventRouter::OnFormattingFinished(
     const std::string& device_path, bool success) {
   if (success) {
     notifications_->HideNotification(FileBrowserNotifications::FORMAT_START,
                                      device_path);
     notifications_->ShowNotification(FileBrowserNotifications::FORMAT_SUCCESS,
                                      device_path);
     // Hide it after a couple of seconds.
     notifications_->HideNotificationDelayed(
         FileBrowserNotifications::FORMAT_SUCCESS, device_path, 4000);
-
-    DiskMountManager::GetInstance()->MountPath(device_path,
+    // MountPath auto-detects filesystem format if second argument is empty.
+    DiskMountManager::GetInstance()->MountPath(device_path, std::string(),
                                                chromeos::MOUNT_TYPE_DEVICE);
   } else {
     notifications_->HideNotification(FileBrowserNotifications::FORMAT_START,
                                      device_path);
     notifications_->ShowNotification(FileBrowserNotifications::FORMAT_FAIL,
                                      device_path);
   }
 }
 
 // FileBrowserEventRouter::WatcherDelegate methods.
@@ skipping 120 matching lines @@
   return scoped_refptr<RefcountedProfileKeyedService>(
       new FileBrowserEventRouter(profile));
 }
 
 bool FileBrowserEventRouterFactory::ServiceHasOwnInstanceInIncognito() {
   // Explicitly and always allow this router in guest login mode.   see
   // chrome/browser/profiles/profile_keyed_base_factory.h comment
   // for the details.
   return true;
 }