Don't use a scoped_refptr for StringVar::FromPPVar

ppapi/proxy/resource_creation_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/resource_creation_proxy.h"
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/pp_size.h"
 #include "ppapi/proxy/interface_id.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
@@ skipping 193 matching lines @@
       type != PP_INPUTEVENT_TYPE_KEYDOWN &&
       type != PP_INPUTEVENT_TYPE_KEYUP &&
       type != PP_INPUTEVENT_TYPE_CHAR)
     return 0;
   ppapi::InputEventData data;
   data.event_type = type;
   data.event_time_stamp = time_stamp;
   data.event_modifiers = modifiers;
   data.key_code = key_code;
   if (character_text.type == PP_VARTYPE_STRING) {
-    scoped_refptr<StringVar> text_str(StringVar::FromPPVar(character_text));
+    StringVar* text_str = StringVar::FromPPVar(character_text);
     if (!text_str)
       return 0;
     data.character_text = text_str->value();
   }
 
   return PPB_InputEvent_Proxy::CreateProxyResource(instance, data);
 }
 
 PP_Resource ResourceCreationProxy::CreateMouseInputEvent(
     PP_Instance instance,
@@ skipping 173 matching lines @@
       *result_image_handle = dispatcher_->ShareHandleWithRemote(ih, false);
 #else
       *result_image_handle = ImageData::HandleFromInt(handle);
 #endif
     }
   }
 }
 
 }  // namespace proxy
 }  // namespace ppapi