Update map literal syntax to expect only one type parameter

Update map literal syntax to expect only one type parameter

As of the spec v0.6, the correct syntax is now:
  <V>{"key" : value }; 
Whereas you used to also specify the key. Added a deprecation warning 
for the old syntax.

http://code.google.com/p/dart/issues/detail?id=1151

Committed: https://code.google.com/p/dart/source/detail?r=3606

[zundel, 2012-01-24 22:03:25]

@sra: I went ahead and updated the htmlimpl.dart by hand as well as the source
where it came from, hope that was OK.

[scheglov, 2012-01-25 15:16:20]

LGTM

[zundel, 2012-01-25 20:27:29]

Spoke with sra privately and he suggested CC'ing nweiz and jacobr.

Committed as r3606

[nweiz, 2012-01-25 21:15:02]

lgtm

In future, you can run "../tools/copy_dart.py release htmlimpl.dart" from
client/html/ to automatically regenerate htmlimpl.

[Siggi Cherem (dart-lang), 2012-01-25 23:26:53]

https://chromiumcodereview.appspot.com/9235015/diff/1/client/html/src/EventTa...
File client/html/src/EventTargetWrappingImplementation.dart (left):

https://chromiumcodereview.appspot.com/9235015/diff/1/client/html/src/EventTa...
client/html/src/EventTargetWrappingImplementation.dart:12: // TODO(sigmund): the
key type (String) yields a warning in frog and the vm,
Thanks Eric!