Dart SDK 0.7.1.0_r27025 breaks ctrl-alt-foo

[KarstenB]

The Exception trace is:
Uncaught Error: Class 'KeyboardEvent' has no instance getter '$dom_keyIdentifier'.

NoSuchMethodError : method not found: '$dom_keyIdentifier'
Receiver: Instance of 'KeyboardEvent'
Arguments: []
Stack Trace:
#0 Object.noSuchMethod (dart:core-patch/object_patch.dart:20:25)
#1 KeyEventX.$dom_keyIdentifier (package:ctrl_alt_foo/key_event_x.dart:32:44)
#2 KeyEventX.keyIdentifier (package:ctrl_alt_foo/key_event_x.dart:34:9)
#3 KeyEventX._hasKeyIdentifier (package:ctrl_alt_foo/key_event_x.dart:83:9)
#4 KeyEventX.keyCode (package:ctrl_alt_foo/key_event_x.dart:75:9)
#5 KeyEventX.key (package:ctrl_alt_foo/key_event_x.dart:67:9)
#6 KeyEventX.isKey (package:ctrl_alt_foo/key_event_x.dart:54:38)
#7 ShortCut._createStream. (package:ctrl_alt_foo/shortcut.dart:76:19)
#8 _BufferingStreamSubscription._sendData. (dart:async/stream_impl.dart:184:55)
#9 _ZoneBase._runInZone (dart:async/zone.dart:82:17)
#10 _ZoneBase._runGuarded (dart:async/zone.dart:99:22)
#11 _ZoneBase.executePeriodicCallbackGuarded (dart:async/zone.dart:68:21)
#12 _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:184:41)
#13 _BufferingStreamSubscription._add (dart:async/stream_impl.dart:135:16)
#14 _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:57:15)
#15 _MapStream._handleData (dart:async/stream_pipe.dart:121:14)
#16 _handleData (dart:async/stream_pipe.dart:79:24)