Add utf_string_conversions to base namespace.

chrome/browser/extensions/api/tabs/tabs_api.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/extensions/api/tabs/tabs_api.h"
 
 #include <algorithm>
 #include <limits>
 #include <vector>
 
@@ skipping 2082 matching lines @@
     if (!Execute(data))
       SendResponse(false);
   } else {
 #if defined(OS_POSIX)
     // TODO(viettrungluu): bug: there's no particular reason the path should be
     // UTF-8, in which case this may fail.
     error_ = ErrorUtils::FormatErrorMessage(keys::kLoadFileError,
         resource_.relative_path().value());
 #elif defined(OS_WIN)
     error_ = ErrorUtils::FormatErrorMessage(keys::kLoadFileError,
-        WideToUTF8(resource_.relative_path().value()));
+        base::WideToUTF8(resource_.relative_path().value()));
 #endif  // OS_WIN
     SendResponse(false);
   }
 }
 
 bool ExecuteCodeInTabFunction::Execute(const std::string& code_string) {
   content::WebContents* contents = NULL;
   Browser* browser = NULL;
 
   bool success = ExtensionTabUtil::GetTabById(
@@ skipping 40 matching lines @@
           extension->id(),
           script_type,
           code_string,
           frame_scope,
           run_at,
           ScriptExecutor::ISOLATED_WORLD,
           false /* is_web_view */,
           base::Bind(&ExecuteCodeInTabFunction::OnExecuteCodeFinished, this));
   return true;
 }