[Media Gallery] Added code to support mtp device media file system on Windows.

chrome/browser/system_monitor/removable_storage_notifications.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_STORAGE_NOTIFICATIONS_H_
 #define CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_STORAGE_NOTIFICATIONS_H_
 
 #include "base/file_path.h"
 #include "base/system_monitor/system_monitor.h"
 
@@ skipping 12 matching lines @@
   // Finds the device that contains |path| and populates |device_info|.
   // Should be able to handle any path on the local system, not just removable
   // storage. Returns false if unable to find the device.
   virtual bool GetDeviceInfoForPath(
       const FilePath& path,
       base::SystemMonitor::RemovableStorageInfo* device_info) const = 0;
 
   // Returns the storage size of the device present at |location|. If the
   // device information is unavailable, returns zero.
   virtual uint64 GetStorageSize(const std::string& location) const = 0;
+
+#if defined(OS_WIN)
+  // Gets the MTP device storage information specified by |storage_device_id|.
+  // On success, returns true and fills in |device_location| with device
+  // interface details and |storage_object_id| with storage object temporary

[Lei Zhang, 2013/01/14 20:49:02]

Both here and in portable_device_watcher_win.h, you use the term "storage object
temporary identifier". At some level, you should define what a "storage object
temporary identifier" is, because it's not a well known term.

[kmadhusu, 2013/01/15 19:08:17]

Done.

+  // identifier.
+  virtual bool GetMTPStorageInfoFromDeviceId(
+      const std::string& storage_device_id,
+      string16* device_location,
+      string16* storage_object_id) const = 0;
+#endif
 };
 
 } // namespace chrome
 
 #endif  // CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_STORAGE_NOTIFICATIONS_H_