Revert r42426: Re-enable regexp test.

This test still times out with --optimization-counter-threshold=5

TBR=zerny@google.com

Review URL: https://codereview.chromium.org//808143002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42428 260f80e4-7a28-3924-810f-c04153c831b5
Create a Tree IR builder for JavaScript specific nodes.

R=johnniwinther@google.com

Review URL: https://codereview.chromium.org//795933005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42429 260f80e4-7a28-3924-810f-c04153c831b5
Use CURRENT_ELEMENT_SPANNABLE in invariant.

R=johnniwinther@google.com

Review URL: https://codereview.chromium.org//812023002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42430 260f80e4-7a28-3924-810f-c04153c831b5
Fix a merge error that was included in r42429.

R=sigurdm@google.com

Review URL: https://codereview.chromium.org//812803002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42431 260f80e4-7a28-3924-810f-c04153c831b5
Add filtering to completion tests.

This allows the negative completion tests to be run.

R=scheglov@google.com

Review URL: https://codereview.chromium.org//798173004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42432 260f80e4-7a28-3924-810f-c04153c831b5