Removing remaining CrOS implicit conversions from scoped_refptr to T*

chrome/browser/chromeos/fileapi/file_system_backend.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/chromeos/fileapi/file_system_backend.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/chromeos/fileapi/file_access_permissions.h"
@@ skipping 277 matching lines @@
     *error_code = base::File::FILE_ERROR_SECURITY;
     return NULL;
   }
 
   if (url.type() == storage::kFileSystemTypeDeviceMediaAsFileStorage) {
     // MTP file operations run on MediaTaskRunner.
     return storage::FileSystemOperation::Create(
         url,
         context,
         make_scoped_ptr(new storage::FileSystemOperationContext(
-            context, MediaFileSystemBackend::MediaTaskRunner())));
+            context, MediaFileSystemBackend::MediaTaskRunner().get())));
   }
 
   DCHECK(url.type() == storage::kFileSystemTypeNativeLocal ||
          url.type() == storage::kFileSystemTypeRestrictedNativeLocal ||
          url.type() == storage::kFileSystemTypeDrive ||
          url.type() == storage::kFileSystemTypeProvided);
   return storage::FileSystemOperation::Create(
       url,
       context,
       make_scoped_ptr(new storage::FileSystemOperationContext(context)));
@@ skipping 116 matching lines @@
     case storage::kFileSystemTypeRestrictedNativeLocal:
       callback.Run(GURL());
       return;
     default:
       NOTREACHED();
   }
   callback.Run(GURL());
 }
 
 }  // namespace chromeos