Use a direct include of strings headers in remoting/.

remoting/host/ui_strings.h

 // Copyright (c) 2011 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 REMOTING_HOST_UI_STRINGS_H_
 #define REMOTING_HOST_UI_STRINGS_H_
 
-#include "base/string16.h"
+#include "base/strings/string16.h"
 
 // This struct contains localized strings to be displayed in host dialogs.
 // For the web-app, these are loaded from the appropriate messages.json
 // file when the plugin is created. For remoting_simple_host, they are
 // left set to the default (English) values.
 //
 // Since we don't anticipate having a significant host-side UI presented
 // in this way, a namespace containing all available strings should be
 // a reasonable way to implement this.
 
@@ skipping 22 matching lines @@
   // The label on the 'Continue' button of the continue window.
   string16 continue_button_text;
 
   // The label on the 'Stop Sharing' button of the continue window.
   string16 stop_sharing_button_text;
 };
 
 }
 
 #endif // REMOTING_HOST_UI_STRINGS_H_