Remove implicit conversions from scoped_refptr to T* in chrome/browser/sync_file_system/

chrome/browser/sync_file_system/local/root_delete_helper.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 "chrome/browser/sync_file_system/local/root_delete_helper.h"
 
 #include "base/sequenced_task_runner.h"
 #include "chrome/browser/sync_file_system/local/local_file_change_tracker.h"
 #include "chrome/browser/sync_file_system/local/local_file_sync_status.h"
 #include "chrome/browser/sync_file_system/local/sync_file_system_backend.h"
@@ skipping 25 matching lines @@
 RootDeleteHelper::RootDeleteHelper(
     storage::FileSystemContext* file_system_context,
     LocalFileSyncStatus* sync_status,
     const storage::FileSystemURL& url,
     const FileStatusCallback& callback)
     : file_system_context_(file_system_context),
       url_(url),
       callback_(callback),
       sync_status_(sync_status),
       weak_factory_(this) {
-  DCHECK(file_system_context_);
+  DCHECK(file_system_context_.get());
   DCHECK(url_.is_valid());
   DCHECK(!callback_.is_null());
   DCHECK(sync_status_);
   // This is expected to run on the filesystem root.
   DCHECK(storage::VirtualPath::IsRootPath(url.path()));
 }
 
 RootDeleteHelper::~RootDeleteHelper() {
 }
 
@@ skipping 40 matching lines @@
 }
 
 void RootDeleteHelper::DidOpenFileSystem(const GURL& /* root */,
                                          const std::string& /* name */,
                                          base::File::Error error) {
   FileStatusCallback callback = callback_;
   callback.Run(error);
 }
 
 }  // namespace sync_file_system