Update Linux to use scoped_refptr<T>::get() rather than implicit "operator T*"

gpu/command_buffer/service/buffer_manager.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/buffer_manager.h"
 #include <limits>
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/error_state.h"
@@ skipping 32 matching lines @@
 void BufferManager::CreateBuffer(GLuint client_id, GLuint service_id) {
   scoped_refptr<Buffer> buffer(new Buffer(this, service_id));
   std::pair<BufferMap::iterator, bool> result =
       buffers_.insert(std::make_pair(client_id, buffer));
   DCHECK(result.second);
 }
 
 Buffer* BufferManager::GetBuffer(
     GLuint client_id) {
   BufferMap::iterator it = buffers_.find(client_id);
-  return it != buffers_.end() ? it->second : NULL;
+  return it != buffers_.end() ? it->second.get() : NULL;
 }
 
 void BufferManager::RemoveBuffer(GLuint client_id) {
   BufferMap::iterator it = buffers_.find(client_id);
   if (it != buffers_.end()) {
     Buffer* buffer = it->second.get();
     buffer->MarkAsDeleted();
     buffers_.erase(it);
   }
 }
@@ skipping 249 matching lines @@
   if (buffer->target() == 0) {
     buffer->set_target(target);
   }
   return true;
 }
 
 }  // namespace gles2
 }  // namespace gpu