Don't use a scoped_refptr for StringVar::FromPPVar

ppapi/proxy/ppb_url_util_proxy.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 "ppapi/proxy/ppb_url_util_proxy.h"
 
 #include "base/basictypes.h"
 #include "ppapi/c/dev/ppb_url_util_dev.h"
 #include "ppapi/c/dev/ppb_var_deprecated.h"
 #include "ppapi/c/ppb_core.h"
@@ skipping 18 matching lines @@
 // and this data often isn't needed.
 //
 // To avoid this, we instead just parse the result again in the plugin, which
 // this function does if the given URL is valid and the components are
 // non-NULL. The URL var will be returned.
 PP_Var ConvertComponentsAndReturnURL(PP_Var url,
                                      PP_URLComponents_Dev* components) {
   if (!components)
     return url;  // Common case - plugin doesn't care about parsing.
 
-  scoped_refptr<StringVar> url_string(StringVar::FromPPVar(url));
+  StringVar* url_string = StringVar::FromPPVar(url);
   if (!url_string)
     return url;
 
   PP_Var result = Canonicalize(url, components);
   PluginResourceTracker::GetInstance()->var_tracker().ReleaseVar(url);
   return result;
 }
 
 PP_Var ResolveRelativeToURL(PP_Var base_url,
                             PP_Var relative,
@@ skipping 155 matching lines @@
 
 void PPB_URLUtil_Proxy::OnMsgGetPluginInstanceURL(
     PP_Instance instance, SerializedVarReturnValue result) {
   result.Return(dispatcher(),
                 ppb_url_util_target()->GetPluginInstanceURL(instance, NULL));
 }
 
 }  // namespace proxy
 }  // namespace ppapi