Use a direct include of strings headers in content/browser/, part 2.

content/browser/renderer_host/gtk_key_bindings_handler.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 "content/browser/renderer_host/gtk_key_bindings_handler.h"
 
 #include <gdk/gdkkeysyms.h>
 
 #include <string>
 
 #include "base/logging.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 
 namespace content {
 
 GtkKeyBindingsHandler::GtkKeyBindingsHandler(GtkWidget* parent_widget)
     : handler_(CreateNewHandler()) {
   DCHECK(GTK_IS_FIXED(parent_widget));
   // We need add the |handler_| object into gtk widget hierarchy, so that
   // gtk_bindings_activate_event() can find correct display and keymaps from
   // the |handler_| object.
@@ skipping 261 matching lines @@
   // Just for disabling the default handler.
   return FALSE;
 }
 
 void GtkKeyBindingsHandler::MoveFocus(GtkWidget* widget,
                                       GtkDirectionType arg1) {
   // Just for disabling the default handler.
 }
 
 }  // namespace content