Use package:sky imports consistently

sky/sdk/lib/rendering/paragraph.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 'dart:sky' as sky;
 
-import 'box.dart';
-import 'object.dart';
-import '../painting/text_style.dart';
+import 'package:sky/painting/text_style.dart';
+import 'package:sky/rendering/box.dart';
+import 'package:sky/rendering/object.dart';
 
 abstract class InlineBase {
   sky.Node _toDOM(sky.Document owner);
   String toString([String prefix = '']);
 }
 
 class InlineText extends InlineBase {
   InlineText(this.text) {
     assert(text != null);
   }
@@ skipping 169 matching lines @@
   }
 
   // we should probably expose a way to do precise (inter-glpyh) hit testing
 
   String debugDescribeSettings(String prefix) {
     String result = '${super.debugDescribeSettings(prefix)}';
     result += '${prefix}inline:\n${inline.toString("$prefix  ")}\n';
     return result;
   }
 }