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

chrome/browser/chromeos/drive/file_cache_metadata.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 "chrome/browser/chromeos/drive/file_cache_metadata.h"
 
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/metrics/histogram.h"
@@ skipping 171 matching lines @@
 
 scoped_ptr<FileCacheMetadata::Iterator> FileCacheMetadata::GetIterator() {
   AssertOnSequencedWorkerPool();
 
   scoped_ptr<leveldb::Iterator> iter(level_db_->NewIterator(
       leveldb::ReadOptions()));
   return make_scoped_ptr(new Iterator(iter.Pass()));
 }
 
 void FileCacheMetadata::AssertOnSequencedWorkerPool() {
-  DCHECK(!blocking_task_runner_ ||
+  DCHECK(!blocking_task_runner_.get() ||
          blocking_task_runner_->RunsTasksOnCurrentThread());
 }
 
 }  // namespace internal
 }  // namespace drive