Use a direct include of strings headers in remoting/.

remoting/host/host_port_allocator.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 "remoting/host/host_port_allocator.h"
 
 #include "base/bind.h"
 #include "base/stl_util.h"
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "googleurl/src/gurl.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "remoting/host/network_settings.h"
 #include "remoting/jingle_glue/chromium_socket_factory.h"
 
 namespace remoting {
 
@@ skipping 156 matching lines @@
     const std::string& content_name,
     int component,
     const std::string& ice_username_fragment,
     const std::string& ice_password) {
   return new HostPortAllocatorSession(
       this, content_name, component, ice_username_fragment, ice_password,
       stun_hosts(), relay_hosts(), relay_token(), url_context_);
 }
 
 }  // namespace remoting