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

chrome/browser/system_monitor/removable_device_notifications_window_win.h

Index: chrome/browser/system_monitor/removable_device_notifications_window_win.h
diff --git a/chrome/browser/system_monitor/removable_device_notifications_window_win.h b/chrome/browser/system_monitor/removable_device_notifications_window_win.h
index 0fc83ae298a64e179b04841024a560b944129266..90321c04e16ab7b9a150679d37d20789023b66cb 100644
--- a/chrome/browser/system_monitor/removable_device_notifications_window_win.h
+++ b/chrome/browser/system_monitor/removable_device_notifications_window_win.h
@@ -64,8 +64,11 @@ class RemovableDeviceNotificationsWindowWin
       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,
@@ -82,13 +85,23 @@ class RemovableDeviceNotificationsWindowWin
       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_;