Use a direct include of utf_string_conversions.h in content/.

content/renderer/browser_plugin/browser_plugin.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/renderer/browser_plugin/browser_plugin.h"
 
 #include "base/command_line.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/message_loop.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
-#include "base/utf_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 #include "content/common/browser_plugin/browser_plugin_constants.h"
 #include "content/common/browser_plugin/browser_plugin_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/browser_plugin/browser_plugin_bindings.h"
 #include "content/renderer/browser_plugin/browser_plugin_compositing_helper.h"
 #include "content/renderer/browser_plugin/browser_plugin_manager.h"
 #include "content/renderer/render_process_impl.h"
@@ skipping 1595 matching lines @@
     const WebKit::WebMouseEvent& event) {
   browser_plugin_manager()->Send(
       new BrowserPluginHostMsg_HandleInputEvent(render_view_routing_id_,
                                                 guest_instance_id_,
                                                 plugin_rect_,
                                                 &event));
   return true;
 }
 
 }  // namespace content