Cleanup: Misc fixes to MediaDeviceNotifications.

chrome/browser/media_gallery/media_device_notifications_window_win.cc

 // 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.
 
 #include "chrome/browser/media_gallery/media_device_notifications_window_win.h"
 
 #include <windows.h>
 #include <dbt.h>
+
 #include <string>
 
 #include "base/file_path.h"
 #include "base/sys_string_conversions.h"
 #include "base/system_monitor/system_monitor.h"
 #include "base/win/wrapped_window_proc.h"
 
-static const wchar_t* const WindowClassName =
-    L"Chrome_MediaDeviceNotificationWindow";
+namespace {
 
-namespace {
+const wchar_t WindowClassName[] = L"Chrome_MediaDeviceNotificationWindow";
 
 LRESULT GetVolumeName(LPCWSTR drive,
                       LPWSTR volume_name,
                       unsigned int volume_name_len) {
   return GetVolumeInformation(drive, volume_name, volume_name_len, NULL, NULL,
       NULL, NULL, 0);
 }
 
 // Returns 0 if the devicetype is not volume.
 DWORD GetVolumeBitMaskFromBroadcastHeader(DWORD data) {
@@ skipping 106 matching lines @@
     LPARAM lparam) {
   MediaDeviceNotificationsWindowWin* msg_wnd =
       reinterpret_cast<MediaDeviceNotificationsWindowWin*>(
           GetWindowLongPtr(hwnd, GWLP_USERDATA));
   if (msg_wnd)
     return msg_wnd->WndProc(hwnd, message, wparam, lparam);
   return ::DefWindowProc(hwnd, message, wparam, lparam);
 }
 
 }  // namespace chrome