Use base namespace for string16 in chrome/renderer.

chrome/renderer/net/net_error_helper.cc

 // Copyright (c) 2013 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/net_error_helper.h"
 
 #include <string>
 
 #include "base/json/json_writer.h"
 #include "base/metrics/histogram.h"
@@ skipping 210 matching lines @@
                              is_failed_post_,
                              RenderThread::Get()->GetLocale(),
                              render_view()->GetAcceptLanguages(),
                              &error_strings);
 
   std::string json;
   JSONWriter::Write(&error_strings, &json);
 
   std::string js = "if (window.updateForDnsProbe) "
                    "updateForDnsProbe(" + json + ");";
-  string16 js16;
+  base::string16 js16;
   if (!UTF8ToUTF16(js.c_str(), js.length(), &js16)) {
     NOTREACHED();
     return;
   }
 
   DVLOG(1) << "Updating error page with status "
            << chrome_common_net::DnsProbeStatusToString(last_probe_status_);
   DVLOG(2) << "New strings: " << js;
 
-  string16 frame_xpath;
+  base::string16 frame_xpath;
   render_view()->EvaluateScript(frame_xpath, js16, 0, false);
 
   UMA_HISTOGRAM_ENUMERATION("DnsProbe.ErrorPageUpdateStatus",
                             last_probe_status_,
                             chrome_common_net::DNS_PROBE_MAX);
 }
 
 blink::WebURLError NetErrorHelper::GetUpdatedError() const {
   // If a probe didn't run or wasn't conclusive, restore the original error.
   if (last_probe_status_ == chrome_common_net::DNS_PROBE_NOT_RUN ||
       last_probe_status_ ==
           chrome_common_net::DNS_PROBE_FINISHED_INCONCLUSIVE) {
     return last_error_;
   }
 
   blink::WebURLError error;
   error.domain = blink::WebString::fromUTF8(
       chrome_common_net::kDnsProbeErrorDomain);
   error.reason = last_probe_status_;
   error.unreachableURL = last_error_.unreachableURL;
 
   return error;
 }