Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/speech/chrome_speech_recognition_manager_delegate.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 "chrome/browser/speech/chrome_speech_recognition_manager_delegate.h"
 
 #include <set>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 81 matching lines @@
 #endif
   }
 
   void GetHardwareInfo() {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
     base::AutoLock lock(lock_);
     can_report_metrics_ = true;
     base::string16 device_model =
         SpeechRecognitionManager::GetInstance()->GetAudioInputDeviceModel();
 #if defined(OS_WIN)
-    value_ = UTF16ToUTF8(
+    value_ = base::UTF16ToUTF8(
         installer::WMIComputerSystem::GetModel() + L"|" + device_model);
 #else  // defined(OS_WIN)
-    value_ = UTF16ToUTF8(device_model);
+    value_ = base::UTF16ToUTF8(device_model);
 #endif  // defined(OS_WIN)
   }
 
   std::string value() {
     base::AutoLock lock(lock_);
     return value_;
   }
 
   bool can_report_metrics() {
     base::AutoLock lock(lock_);
@@ skipping 340 matching lines @@
     allowed = true;
     if (js_api)
       check_permission = true;
   }
 
   BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
                           base::Bind(callback, check_permission, allowed));
 }
 
 }  // namespace speech