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

gpu/command_buffer/service/renderbuffer_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/renderbuffer_manager.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
@@ skipping 119 matching lines @@
       renderbuffers_.insert(std::make_pair(client_id, renderbuffer));
   DCHECK(result.second);
   if (!renderbuffer->cleared()) {
     ++num_uncleared_renderbuffers_;
   }
 }
 
 Renderbuffer* RenderbufferManager::GetRenderbuffer(
     GLuint client_id) {
   RenderbufferMap::iterator it = renderbuffers_.find(client_id);
-  return it != renderbuffers_.end() ? it->second : NULL;
+  return it != renderbuffers_.end() ? it->second.get() : NULL;
 }
 
 void RenderbufferManager::RemoveRenderbuffer(GLuint client_id) {
   RenderbufferMap::iterator it = renderbuffers_.find(client_id);
   if (it != renderbuffers_.end()) {
     Renderbuffer* renderbuffer = it->second.get();
     renderbuffer->MarkAsDeleted();
     renderbuffers_.erase(it);
   }
 }
@@ skipping 31 matching lines @@
         return GL_RGB;
     }
   }
   return impl_format;
 }
 
 }  // namespace gles2
 }  // namespace gpu