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

cc/resources/raster_worker_pool.cc

 // Copyright 2013 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 "cc/resources/raster_worker_pool.h"
 
 #include "base/json/json_writer.h"
 #include "base/metrics/histogram.h"
 #include "base/values.h"
 #include "cc/debug/devtools_instrumentation.h"
@@ skipping 477 matching lines @@
   if (new_graph.empty()) {
     SetTaskGraph(&new_graph);
     raster_finished_task_ = NULL;
     return;
   }
 
   ++schedule_raster_tasks_count_;
 
   scoped_refptr<internal::WorkerPoolTask> new_raster_finished_task(
       new RasterFinishedWorkerPoolTaskImpl(
-          base::MessageLoopProxy::current(),
+          base::MessageLoopProxy::current().get(),
           base::Bind(&RasterWorkerPool::OnRasterFinished,
                      weak_ptr_factory_.GetWeakPtr(),
                      schedule_raster_tasks_count_)));
   raster_finished_node->set_task(new_raster_finished_task.get());
   // Insert "raster finished" task before switching to new graph.
   new_graph.set(new_raster_finished_task.get(), raster_finished_node.Pass());
   SetTaskGraph(&new_graph);
   raster_finished_task_.swap(new_raster_finished_task);
 }
 
 bool RasterWorkerPool::IsRasterTaskRequiredForActivation(
     internal::RasterWorkerPoolTask* task) const {
   return
       raster_tasks_required_for_activation_.find(task) !=
       raster_tasks_required_for_activation_.end();
 }
 
 void RasterWorkerPool::OnRasterFinished(int64 schedule_raster_tasks_count) {
   TRACE_EVENT1("cc", "RasterWorkerPool::OnRasterFinished",
                "schedule_raster_tasks_count", schedule_raster_tasks_count);
   DCHECK_GE(schedule_raster_tasks_count_, schedule_raster_tasks_count);
   // Call OnRasterTasksFinished() when we've finished running all raster
   // tasks needed since last time SetRasterTaskGraph() was called.
   if (schedule_raster_tasks_count_ == schedule_raster_tasks_count)
     OnRasterTasksFinished();
 }
 
 }  // namespace cc