Move default_plugin from webkit/ to chrome/

chrome/default_plugin/plugin_impl_gtk.h

 // Copyright (c) 2010 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.
 
-#ifndef WEBKIT_DEFAULT_PLUGIN_PLUGIN_IMPL_GTK_H_
-#define WEBKIT_DEFAULT_PLUGIN_PLUGIN_IMPL_GTK_H_
+#ifndef CHROME_DEFAULT_PLUGIN_PLUGIN_IMPL_GTK_H_
+#define CHROME_DEFAULT_PLUGIN_PLUGIN_IMPL_GTK_H_
 
 #include <string>
 #include <vector>
 
 #include <gtk/gtk.h>
 
 #include "gfx/native_widget_types.h"
 #include "third_party/npapi/bindings/npapi.h"
 
 // Possible plugin installer states.
@@ skipping 256 matching lines @@
   // The desired mime type.
   std::string mime_type_;
   // The current state of the plugin installer.
   PluginInstallerState plugin_installer_state_;
   // GtkPlug containing everything in the plugin.
   GtkWidget* container_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginInstallerImpl);
 };
 
-#endif  // WEBKIT_DEFAULT_PLUGIN_PLUGIN_IMPL_GTK_H_
+#endif  // CHROME_DEFAULT_PLUGIN_PLUGIN_IMPL_GTK_H_