Update uses of UTF conversions in content/ to use the base:: namespace.

content/renderer/media/media_stream_audio_processor_options.cc

 // Copyright 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 "content/renderer/media/media_stream_audio_processor_options.h"
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 62 matching lines @@
 #if defined(CHROMEOS)
   PathService::Get(base::DIR_TEMP, &path);
 #elif defined(ANDROID)
   path = base::FilePath(FILE_PATH_LITERAL("sdcard"));
 #else
   PathService::Get(base::DIR_EXE, &path);
 #endif
   base::FilePath file = path.Append(FILE_PATH_LITERAL("audio.aecdump"));
 
 #if defined(OS_WIN)
-  const std::string file_name = WideToUTF8(file.value());
+  const std::string file_name = base::WideToUTF8(file.value());
 #else
   const std::string file_name = file.value();
 #endif
   if (audio_processing->StartDebugRecording(file_name.c_str()))
     DLOG(ERROR) << "Fail to start AEC debug recording";
 }
 
 void StopAecDump(AudioProcessing* audio_processing) {
   if (audio_processing->StopDebugRecording())
     DLOG(ERROR) << "Fail to stop AEC debug recording";
 }
 
 }  // namespace content