Created a helper function "FindDiskBySourcePath" in DiskMountManager.

chrome/browser/media_gallery/media_device_notifications_chromeos.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.
 
 // chromeos::MediaDeviceNotifications implementation.
 
 #include "chrome/browser/media_gallery/media_device_notifications_chromeos.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/media_gallery/media_device_notifications_utils.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace chromeos {
 
 namespace {
 
 std::string GetDeviceUuid(const std::string& source_path) {
   // Get the media device uuid if exists.
-  const disks::DiskMountManager::DiskMap& disks =
-      disks::DiskMountManager::GetInstance()->disks();
-  disks::DiskMountManager::DiskMap::const_iterator it = disks.find(source_path);
-  return it == disks.end() ? std::string() : it->second->fs_uuid();
+  const disks::DiskMountManager::Disk* disk =
+      disks::DiskMountManager::GetInstance()->FindDiskBySourcePath(source_path);
+  return disk ==  NULL ? std::string() : disk->fs_uuid();

[Ben Chan, 2012/08/03 15:04:55]

return disk ? disk->fs_uuid() : std::string();

[kmadhusu, 2012/08/03 18:13:52]

Fixed.

 }
 
 }  // namespace
 
 using content::BrowserThread;
 
 MediaDeviceNotifications::MediaDeviceNotifications() {
   DCHECK(disks::DiskMountManager::GetInstance());
   disks::DiskMountManager::GetInstance()->AddObserver(this);
 }
@@ skipping 87 matching lines @@
 
   mount_map_.insert(std::make_pair(mount_info.mount_path, device_id_str));
   base::SystemMonitor::Get()->ProcessMediaDeviceAttached(
       device_id_str,
       UTF8ToUTF16(FilePath(mount_info.source_path).BaseName().value()),
       base::SystemMonitor::TYPE_PATH,
       mount_info.mount_path);
 }
 
 }  // namespace chrome