Remove implicit conversions from scoped_refptr to T* in gpu/

gpu/command_buffer/service/gpu_scheduler.cc

 // 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.
 
 #include "gpu/command_buffer/service/gpu_scheduler.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/debug/trace_event.h"
@@ skipping 174 matching lines @@
   return command_buffer_->GetTransferBuffer(shm_id);
 }
 
 void GpuScheduler::set_token(int32 token) {
   command_buffer_->SetToken(token);
 }
 
 bool GpuScheduler::SetGetBuffer(int32 transfer_buffer_id) {
   scoped_refptr<Buffer> ring_buffer =
       command_buffer_->GetTransferBuffer(transfer_buffer_id);
-  if (!ring_buffer) {
+  if (!ring_buffer.get()) {
     return false;
   }
 
   if (!parser_.get()) {
     parser_.reset(new CommandParser(handler_));
   }
 
   parser_->SetBuffer(
       ring_buffer->memory(), ring_buffer->size(), 0, ring_buffer->size());
 
@@ skipping 97 matching lines @@
                                                base::Closure task_)
   : fence(fence_),
     issue_time(base::Time::Now()),
     task(task_) {
 }
 
 GpuScheduler::UnscheduleFence::~UnscheduleFence() {
 }
 
 }  // namespace gpu