wm: Update namespace and header define guards.

src/platform/window_manager/shadow.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/shadow.h"
 
 #include <cmath>
 #include <gflags/gflags.h>
 
 #include "chromeos/obsolete_logging.h"
 
 DEFINE_string(shadow_image_dir, "../assets/images",
               "Path to directory containing shadow images");
 
-namespace chromeos {
+namespace window_manager {
 
 // Static members.
 ClutterInterface::Actor* Shadow::top_texture_    = NULL;
 ClutterInterface::Actor* Shadow::bottom_texture_ = NULL;
 ClutterInterface::Actor* Shadow::left_texture_   = NULL;
 ClutterInterface::Actor* Shadow::right_texture_  = NULL;
 ClutterInterface::Actor* Shadow::tl_texture_     = NULL;
 ClutterInterface::Actor* Shadow::tr_texture_     = NULL;
 ClutterInterface::Actor* Shadow::bl_texture_     = NULL;
 ClutterInterface::Actor* Shadow::br_texture_     = NULL;
@@ skipping 123 matching lines @@
       FLAGS_shadow_image_dir + "/" + filename);
   actor->SetName(filename);
   // Even though we don't actually want to display it, we need to add the
   // actor to the default stage; otherwise Clutter complains that actors
   // that are cloned from it are unmappable.
   actor->SetVisibility(false);
   clutter_->GetDefaultStage()->AddActor(actor);
   return actor;
 }
 
-}  // namespace chromeos
+}  // namespace window_manager