[Win, MediaGallery] Enumerate and handle mtp device attach/detach events.

chrome/browser/system_monitor/removable_device_notifications_window_win.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_DEVICE_NOTIFICATIONS_WINDOW_WIN_H_
 #define CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_WINDOW_WIN_H_
 
 #include <windows.h>
 
 #include <map>
@@ skipping 46 matching lines @@
   void InitForTest(GetDeviceInfoFunc getDeviceInfo,
                    GetAttachedDevicesFunc getAttachedDevices);
 
   void OnDeviceChange(UINT event_type, LPARAM data);
 
  private:
   friend class
       base::RefCountedThreadSafe<RemovableDeviceNotificationsWindowWin>;
   friend class TestRemovableDeviceNotificationsWindowWin;
 
-  typedef std::map<FilePath, std::string> MountPointDeviceIdMap;
+  // Key: Mass storage device mount point.
+  // Value: Mass storage device ID string.
+  typedef std::map<string16, std::string> MountPointDeviceIdMap;
 
+  // RemovableDeviceNotificationsWindowWin is ref-counted.
   virtual ~RemovableDeviceNotificationsWindowWin();
 
   static LRESULT CALLBACK WndProcThunk(HWND hwnd, UINT message, WPARAM wparam,
                                        LPARAM lparam);
 
   LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wparam,
                            LPARAM lparam);
 
   void DoInit(GetAttachedDevicesFunc get_attached_devices_func);
 
   void AddNewDevice(const FilePath& device_path);
 
   void AddExistingDevicesOnFileThread(
       GetAttachedDevicesFunc get_attached_devices_func);
 
   void CheckDeviceTypeOnFileThread(const std::string& unique_id,
-                                   const FilePath::StringType& device_name,
+                                   const string16& device_name,
                                    const FilePath& device);
 
-  void ProcessDeviceAttachedOnUIThread(
+  // Handles removable mass storage device attach event on UI thread.
+  void HandleMassStorageDeviceAttachEventOnUIThread(
       const std::string& device_id,
-      const FilePath::StringType& device_name,
-      const FilePath& device);
+      const string16& device_name,
+      const string16& device_location);
+
+  // Handles removable mass storage device detach event on UI thread.
+  void HandleMassStorageDeviceDetachEventOnUIThread(
+      const string16& device_location);
+
+  // Handles media transfer protocol device event on UI thread.
+  // |pnp_device_id| specifies the plug and play device ID string.
+  void HandleMtpDeviceEventOnUIThread(bool is_attach,
+                                      const string16& pnp_device_id);
 
   // The window class of |window_|.
   ATOM window_class_;
   // The handle of the module that contains the window procedure of |window_|.
   HMODULE instance_;
   HWND window_;
 
   GetDeviceInfoFunc get_device_info_func_;
 
   // A map from device mount point to device id. Only accessed on the UI Thread.
   MountPointDeviceIdMap device_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(RemovableDeviceNotificationsWindowWin);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_WINDOW_WIN_H_