wm: Update namespace and header define guards.

src/platform/window_manager/util.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/util.h"
 
 #include <cstdarg>
 #include <cstdlib>
 #include <ctime>
 #include <string.h>
 
 #include <iomanip>
 #include <sstream>
 
 #include "chromeos/obsolete_logging.h"
 
-namespace chromeos {
+namespace window_manager {
 
 ByteMap::ByteMap(int width, int height)
     : width_(width),
       height_(height) {
   CHECK_GT(width, 0);
   CHECK_GT(height, 0);
   bytes_ = new unsigned char[width * height];
   Clear(0);
 }
 
@@ skipping 35 matching lines @@
 }
 
 
 void FillTimeval(double time, struct timeval* tv) {
   CHECK(tv);
   tv->tv_sec = static_cast<__time_t>(time);
   tv->tv_usec =
       static_cast<__suseconds_t>(1000000 * (time - static_cast<int>(time)));
 }
 
-}  // namespace chromeos
+}  // namespace window_manager