Add utf_string_conversions to base namespace.

chrome/browser/google_apis/gdata_wapi_parser.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/google_apis/gdata_wapi_parser.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 562 matching lines @@
       else
         return std::string();
     }
   }
   return std::string();
 }
 
 // static
 bool ResourceEntry::HasHostedDocumentExtension(const base::FilePath& file) {
 #if defined(OS_WIN)
-  std::string file_extension = WideToUTF8(file.Extension());
+  std::string file_extension = base::WideToUTF8(file.Extension());
 #else
   std::string file_extension = file.Extension();
 #endif
   for (size_t i = 0; i < arraysize(kEntryKindMap); ++i) {
     const char* document_extension = kEntryKindMap[i].extension;
     if (document_extension && file_extension == document_extension)
       return true;
   }
   return false;
 }
@@ skipping 420 matching lines @@
 bool AccountMetadataFeed::Parse(const base::Value& value) {
   base::JSONValueConverter<AccountMetadataFeed> converter;
   if (!converter.Convert(value, this)) {
     LOG(ERROR) << "Unable to parse: Invalid account metadata feed!";
     return false;
   }
   return true;
 }
 
 }  // namespace google_apis