[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/observer_list_threadsafe.h"
 #include "base/string16.h"
@@ skipping 35 matching lines @@
   // storage. Returns false if unable to find the device.
   // TODO(gbillock): Change this method signature to use StorageInfo.
   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 the string ID that
+  // uniquely identifies the object on the device. This ID need not be
+  // persistent across sessions.
+  virtual bool GetMTPStorageInfoFromDeviceId(
+      const std::string& storage_device_id,
+      string16* device_location,
+      string16* storage_object_id) const = 0;
+#endif
+
   // Returns information for attached removable storage.
   std::vector<StorageInfo> GetAttachedStorage() const;
 
   void AddObserver(RemovableStorageObserver* obs);
   void RemoveObserver(RemovableStorageObserver* obs);
 
  protected:
   RemovableStorageNotifications();
 
   void ProcessAttach(const std::string& id,
@@ skipping 10 matching lines @@
   // For manipulating removable_storage_map_ structure.
   mutable base::Lock storage_lock_;
 
   // Map of all the attached removable storage devices.
   RemovableStorageMap storage_map_;
 };
 
 } // namespace chrome
 
 #endif  // CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_STORAGE_NOTIFICATIONS_H_