Remove implicit conversions from scoped_refptr to T* in ppapi/

ppapi/proxy/uma_private_resource.cc

 // Copyright 2014 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/uma_private_resource.h"
 
 #include "base/bind.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/resource_message_params.h"
 #include "ppapi/shared_impl/var.h"
@@ skipping 69 matching lines @@
     return;
 
   Post(RENDERER, PpapiHostMsg_UMA_HistogramEnumeration(StringFromPPVar(name),
                                                        sample,
                                                        boundary_value));
 }
 
 int32_t UMAPrivateResource::IsCrashReportingEnabled(
     PP_Instance instance,
     scoped_refptr<TrackedCallback> callback) {
-  if (pending_callback_ != NULL)
+  if (pending_callback_.get() != NULL)
     return PP_ERROR_INPROGRESS;
   pending_callback_ = callback;
   Call<PpapiPluginMsg_UMA_IsCrashReportingEnabledReply>(
       RENDERER,
       PpapiHostMsg_UMA_IsCrashReportingEnabled(),
       base::Bind(&UMAPrivateResource::OnPluginMsgIsCrashReportingEnabled,
           this));
   return PP_OK_COMPLETIONPENDING;
 }
 
 void UMAPrivateResource::OnPluginMsgIsCrashReportingEnabled(
     const ResourceMessageReplyParams& params) {
   if (TrackedCallback::IsPending(pending_callback_))
     pending_callback_->Run(params.result());
   pending_callback_ = NULL;
 }
 
 }  // namespace proxy
 }  // namespace ppapi