Remove implicit conversions from scoped_refptr to T* in ppapi/

ppapi/proxy/plugin_resource.h

 // 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.
 
 #ifndef PPAPI_PROXY_PLUGIN_RESOURCE_H_
 #define PPAPI_PROXY_PLUGIN_RESOURCE_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 189 matching lines @@
                "Class", IPC_MESSAGE_ID_CLASS(msg.type()),
                "Line", IPC_MESSAGE_ID_LINE(msg.type()));
   ResourceMessageCallParams params(pp_resource(), next_sequence_number_++);
   // Stash the |callback| in |callbacks_| identified by the sequence number of
   // the call.
   scoped_refptr<PluginResourceCallbackBase> plugin_callback(
       new PluginResourceCallback<ReplyMsgClass, CallbackType>(callback));
   callbacks_.insert(std::make_pair(params.sequence(), plugin_callback));
   params.set_has_callback();
 
-  if (resource_reply_thread_registrar_) {
+  if (resource_reply_thread_registrar_.get()) {
     resource_reply_thread_registrar_->Register(
         pp_resource(), params.sequence(), reply_thread_hint);
   }
   SendResourceCall(dest, params, msg);
   return params.sequence();
 }
 
 template <class ReplyMsgClass>
 int32_t PluginResource::SyncCall(Destination dest, const IPC::Message& msg) {
   IPC::Message reply;
@@ skipping 58 matching lines @@
 
   if (UnpackMessage<ReplyMsgClass>(reply, a, b, c, d, e))
     return result;
   return PP_ERROR_FAILED;
 }
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PLUGIN_RESOURCE_H_