Convert string16 to base::string16 in content.

content/renderer/media/rtc_data_channel_handler.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/media/rtc_data_channel_handler.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 102 matching lines @@
 
 void RtcDataChannelHandler::OnMessage(const webrtc::DataBuffer& buffer) {
   if (!webkit_client_) {
     LOG(ERROR) << "WebRTCDataChannelHandlerClient not set.";
     return;
   }
 
   if (buffer.binary) {
     webkit_client_->didReceiveRawData(buffer.data.data(), buffer.data.length());
   } else {
-    string16 utf16;
+    base::string16 utf16;
     if (!UTF8ToUTF16(buffer.data.data(), buffer.data.length(), &utf16)) {
       LOG(ERROR) << "Failed convert received data to UTF16";
       return;
     }
     webkit_client_->didReceiveStringData(utf16);
   }
 }
 
 }  // namespace content