Fix min/max typo in BoxConstraints.deflate

sky/tests/raw/padding_deflate.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 '../resources/third_party/unittest/unittest.dart';
 import '../resources/unit.dart';
 import '../resources/display_list.dart';
-import 'dart:sky' as sky;
 import 'package:sky/framework/rendering/box.dart';
 
 void main() {
   initUnit();
 
-  test("should size to render view", () {
-    RenderSizedBox root = new RenderSizedBox(
-      child: new RenderDecoratedBox(
-        decoration: new BoxDecoration(backgroundColor: 0xFF00FF00)
-      )
+  test("should not have a 0 sized colored Box", () {
+    var coloredBox = new RenderDecoratedBox();
+    var paddingBox = new RenderPadding(padding: const EdgeDims.all(10.0),
+        child: coloredBox);
+    RenderBox root = new RenderDecoratedBox(
+      child: paddingBox
     );
     TestView renderView = new TestView(child: root);
     renderView.layout(new ViewConstraints(width: sky.view.width, height: sky.view.height));
-    expect(root.size.width, equals(sky.view.width));
-    expect(root.size.height, equals(sky.view.height));
+    expect(coloredBox.size.width, equals(sky.view.width - 20));
+    expect(coloredBox.size.height, equals(sky.view.height - 20));
     renderView.paintFrame();
     print(renderView.lastPaint); // TODO(ianh): figure out how to make this fit the unit testing framework better
   });
 }