Add notification for media changed, and notify volume mount watcher when it occurs.

components/storage_monitor/volume_mount_watcher_win.h

 // Copyright 2014 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 COMPONENTS_STORAGE_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_
 #define COMPONENTS_STORAGE_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 31 matching lines @@
   // Gets the information about the device mounted at |device_path|. On success,
   // returns true and fills in |info|.
   // Can block during startup while device info is still loading.
   bool GetDeviceInfo(const base::FilePath& device_path,
                      StorageInfo* info) const;
 
   // Processes DEV_BROADCAST_VOLUME messages and triggers a
   // notification if appropriate.
   void OnWindowMessage(UINT event_type, LPARAM data);
 
+  // Processes SHCNE_MEDIAINSERTED (and REMOVED).
+  void OnMediaChanged(WPARAM wparam, LPARAM lparam);
+
   // Set the volume notifications object to be used when new
   // removable volumes are found.
   void SetNotifications(StorageMonitor::Receiver* notifications);
 
   void EjectDevice(const std::string& device_id,
                    base::Callback<void(StorageMonitor::EjectStatus)> callback);
 
  protected:
   typedef base::Callback<bool(const base::FilePath&,
                               StorageInfo*)> GetDeviceDetailsCallbackType;
@@ skipping 52 matching lines @@
   // The notifications object to use to signal newly attached volumes. Only
   // removable devices will be notified.
   StorageMonitor::Receiver* notifications_;
 
   DISALLOW_COPY_AND_ASSIGN(VolumeMountWatcherWin);
 };
 
 }  // namespace storage_monitor
 
 #endif  // COMPONENTS_STORAGE_MONITOR_VOLUME_MOUNT_WATCHER_WIN_H_