WebKit IDL are getting closer to the standard, but...
WebKit IDL are getting closer to the standard, but...

ExtAttrs for most of interfaces and attributes were moved
into 1st position, but, alas, there are exceptions.
So for now I support both positions in somewhat hacky way.

TBR=podivilov@chromium.org

Review URL: https://codereview.chromium.org//11230009

git-svn-id: c93d8a2297af3b929165606efe145742a534bc71@13830 260f80e4-7a28-3924-810f-c04153c831b5

dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-lang/sdk,dartino/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dart-archive/dart-sdk,dartino/dart-sdk,dart-lang/sdk,dart-archive/dart-sdk,dart-archive/dart-sdk