Rationalize Dart mojo and sky package structure

sky/sdk/lib/framework/components/input.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.
 
 import '../editing/editable_string.dart';
 import '../editing/editable_text.dart';
 import '../editing/keyboard.dart';
 import '../fn.dart';
 import '../layout.dart';
 import '../theme/colors.dart';
@@ skipping 76 matching lines @@
       new FlexContainer(
         direction: FlexDirection.Column,
         style: _style,
         inlineStyle: focused ? _focusedInlineStyle : null,
         children: children
       ),
       onPointerDown: (sky.Event e) => keyboard.showByRequest()
     );
   }
 }