Move mojo and mojom from mojo/public/dart to mojo/dart/packages

mojo/dart/packages/mojom/lib/src/command_runner.dart

 // Copyright 2015 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.
 
 library mojom.command_runner;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:args/args.dart';
@@ skipping 33 matching lines @@
         abbr: 'v',
         defaultsTo: false,
         negatable: false,
         help: 'Show extra output about what mojom is doing.');
 
     super.addCommand(new CheckCommand());
     super.addCommand(new SinglePackageCommand());
     super.addCommand(new GenCommand());
   }
 }