wm: Update namespace and header define guards.

src/platform/window_manager/atom_cache.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/atom_cache.h"
 
 #include "base/logging.h"
 #include "chromeos/obsolete_logging.h"
 
 #include "window_manager/util.h"
 #include "window_manager/x_connection.h"
 
-namespace chromeos {
+namespace window_manager {
 
 // A value from the Atom enum and the actual name that should be used to
 // look up its ID on the X server.
 struct AtomInfo {
   Atom atom;
   const char* name;
 };
 
 // Each value from the Atom enum must be present here.
 static const AtomInfo kAtomInfos[] = {
@@ skipping 73 matching lines @@
   std::string name;
   if (!xconn_->GetAtomName(xatom, &name)) {
     LOG(ERROR) << "Unable to look up name for atom " << XidStr(xatom);
     static const std::string kEmptyName = "";
     return kEmptyName;
   }
   return xatom_to_string_.insert(make_pair(xatom, name)).first->second;
 }
 
 };