wm: Update namespace and header define guards.

src/platform/window_manager/stacking_manager.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/stacking_manager.h"
 
 #include "window_manager/util.h"
 #include "window_manager/window.h"
 #include "window_manager/x_connection.h"
 
 using std::map;
 using std::set;
 using std::tr1::shared_ptr;
 
-namespace chromeos {
+namespace window_manager {
 
 StackingManager::StackingManager(XConnection* xconn, ClutterInterface* clutter)
     : xconn_(xconn) {
   XWindow root = xconn_->GetRootWindow();
 
   for (int i = kNumLayers - 1; i >= 0; --i) {
     Layer layer = static_cast<Layer>(i);
 
     XWindow xid = xconn_->CreateWindow(root, -1, -1, 1, 1, true, true, 0);
     layer_to_xid_[layer] = xid;
@@ skipping 66 matching lines @@
     case LAYER_DRAGGED_EXPANDED_PANEL:  return "dragged expanded panel layer";
     case LAYER_EXPANDED_PANEL:          return "expanded panel layer";
     case LAYER_FLOATING_TAB:            return "floating tab layer";
     case LAYER_TAB_SUMMARY:             return "tab summary layer";
     case LAYER_TOPLEVEL_WINDOW:         return "toplevel window layer";
     case LAYER_BACKGROUND:              return "background layer";
     default:                            return "unknown layer";
   }
 }
 
-}  // namespace chromeos
+}  // namespace window_manager