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

content/browser/safe_util_win.cc

 // Copyright (c) 2011 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 <shlobj.h>
 #include <shobjidl.h>
 
 #include "content/browser/safe_util_win.h"
 
 #include "base/files/file_path.h"
@@ skipping 63 matching lines @@
       return hr;
   }
 
   hr = attachment_services->SetLocalPath(full_path.value().c_str());
   if (FAILED(hr))
     return hr;
 
   // Note: SetSource looks like it needs to be called, even if empty.
   // Docs say it is optional, but it appears not calling it at all sets
   // a zone that is too restrictive.
-  hr = attachment_services->SetSource(UTF8ToWide(source_url).c_str());
+  hr = attachment_services->SetSource(base::UTF8ToWide(source_url).c_str());
   if (FAILED(hr))
     return hr;
 
   // A failure in the Save() call below could result in the downloaded file
   // being deleted.
   return attachment_services->Save();
 }
 
 }  // namespace content