wm: Update namespace and header define guards.

src/platform/window_manager/hotkey_overlay.cc

 // Copyright (c) 2009 The Chromium OS 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 "window_manager/hotkey_overlay.h"
 
 #include <gflags/gflags.h>
 
 #include "window_manager/clutter_interface.h"
 
 DEFINE_string(hotkey_overlay_image_dir, "../assets/images",
               "Path to directory containing hotkey overlay images");
 
-namespace chromeos {
+namespace window_manager {
 
 // Time to spend in image transitions, in milliseconds.
 // TODO: It'd be nice to do a fade here, but fading from one image to
 // another looks terrible because of the way that alpha compositing is
 // currently working.
 static const int kAnimMs = 0;
 
 HotkeyOverlay::HotkeyOverlay(ClutterInterface* clutter)
     : clutter_(clutter),
       group_(clutter_->CreateGroup()),
@@ skipping 102 matching lines @@
 }
 
 void HotkeyOverlay::HideCurrentImage() {
   if (!current_image_)
     return;
 
   current_image_->SetOpacity(0, kAnimMs);
   current_image_ = NULL;
 }
 
-}  // namespace chromeos
+}  // namespace window_manager