Remove implicit conversions from scoped_refptr to T* in chrome/renderer/

chrome/renderer/media/cast_ipc_dispatcher.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 "chrome/renderer/media/cast_ipc_dispatcher.h"
 
 #include "chrome/common/cast_messages.h"
 #include "chrome/renderer/media/cast_transport_sender_ipc.h"
 #include "ipc/ipc_message_macros.h"
 
 CastIPCDispatcher* CastIPCDispatcher::global_instance_ = NULL;
 
 CastIPCDispatcher::CastIPCDispatcher(
     const scoped_refptr<base::MessageLoopProxy>& io_message_loop)
     : sender_(NULL),
       io_message_loop_(io_message_loop) {
-  DCHECK(io_message_loop_);
+  DCHECK(io_message_loop_.get());
   DCHECK(!global_instance_);
 }
 
 CastIPCDispatcher::~CastIPCDispatcher() {
   DCHECK(io_message_loop_->BelongsToCurrentThread());
   DCHECK(!global_instance_);
 }
 
 CastIPCDispatcher* CastIPCDispatcher::Get() {
   return global_instance_;
@@ skipping 87 matching lines @@
     int32 channel_id,
     uint32 ssrc,
     const media::cast::RtcpCastMessage& cast_message) {
   CastTransportSenderIPC* sender = id_map_.Lookup(channel_id);
   if (sender) {
     sender->OnRtcpCastMessage(ssrc, cast_message);
   } else {
     DVLOG(1) << "CastIPCDispatcher::OnRtt on non-existing channel.";
   }
 }