Use dart.global instead of window in debugger.dart

tool/input_sdk/private/debugger.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart._debugger;
 
 import 'dart:_foreign_helper' show JS;
 import 'dart:_runtime' as dart;
 import 'dart:core';
 
@@ skipping 518 matching lines @@
       ret.add(new NameValuePair(value: new ClassMetadata(type)));
     }
     return ret;
   }
 }
 
 /// This entry point is automatically invoked by the code generated by
 /// Dart Dev Compiler
 registerDevtoolsFormatter() {
   var formatters = [_devtoolsFormatter];
-  JS('', 'window.devtoolsFormatters = #', formatters);
+  JS('', 'dart.global.devtoolsFormatters = #', formatters);

[Jacob, 2016/02/22 17:17:56]

This need to be exposed on the window object not the dart.global object.
The correct fix would be to check that there is a window object and only apply
if there is one.

 }