GitLab

Mostly renumbered and restructured grammar productions.  Notable changes:

- add support for static attributes via StaticMember
- add support for built-in types ByteString and RegExp
- allow trailing comma in enum declarations

Depends on:
IDL parser: drop AttributeOrOperation and StaticAttribute overrides
https://codereview.chromium.org/336733002/
...or else breaks Blink compile.

Review URL: https://codereview.chromium.org/329853005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278365 0039d316-1c4b-4281-b951-d872f2087c98