Adds DNS prefetch support to Chromecast.

components/dns_prefetch/renderer/prescient_networking_dispatcher.cc

-// Copyright 2013 The Chromium Authors. All rights reserved.
+// Copyright 2014 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 "chrome/renderer/net/prescient_networking_dispatcher.h"
+#include "components/dns_prefetch/renderer/prescient_networking_dispatcher.h"
 
-#include "base/strings/utf_string_conversions.h"
+#include "base/logging.h"
 
-using blink::WebPrescientNetworking;
+namespace dns_prefetch {
 
 PrescientNetworkingDispatcher::PrescientNetworkingDispatcher() {
 }
 
 PrescientNetworkingDispatcher::~PrescientNetworkingDispatcher() {
 }
 
 void PrescientNetworkingDispatcher::prefetchDNS(
     const blink::WebString& hostname) {
+  VLOG(2) << "Prefetch DNS: " << hostname.utf8();
   if (hostname.isEmpty())
     return;
 
-  std::string hostname_utf8 = base::UTF16ToUTF8(hostname);
+  std::string hostname_utf8 = hostname.utf8();
   net_predictor_.Resolve(hostname_utf8.data(), hostname_utf8.length());
 }
+
+}  // namespace dns_prefetch