browser: Put more files in chrome namespace.

chrome/browser/ui/gtk/chrome_browser_main_extra_parts_gtk.cc

 // Copyright (c) 2012 The Chromium 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 "chrome/browser/ui/gtk/chrome_browser_main_extra_parts_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include "base/command_line.h"
 #include "chrome/browser/chrome_browser_main.h"
@@ skipping 62 matching lines @@
       GTK_MESSAGE_ERROR,
       GTK_BUTTONS_CLOSE,
       "%s",
       message);
 
   gtk_window_set_title(GTK_WINDOW(dialog), message);
   gtk_dialog_run(GTK_DIALOG(dialog));
   gtk_widget_destroy(dialog);
 }
 
-namespace browser {
+namespace chrome {
 
 void AddGtkToolkitExtraParts(ChromeBrowserMainParts* main_parts) {
   main_parts->AddParts(new ChromeBrowserMainExtraPartsGtk());
 }
 
-}  // namespace browser
+}  // namespace chrome