Ignore redundant parallel moves when checking if a block is empty.

Single predecessor blocks containing nothing but redundant parallel moves can be compacted away.

R=zerny@google.com
BUG=http://dartbug.com/21302

Review URL: https://codereview.chromium.org//669613003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41187 260f80e4-7a28-3924-810f-c04153c831b5
Support conditional expressions in analyzer2dart.

BUG=
R=sigurdm@google.com

Review URL: https://codereview.chromium.org//666863002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41188 260f80e4-7a28-3924-810f-c04153c831b5
Terminate browsers in sequence.

Also make iframe larger.

R=whesse@google.com

Review URL: https://codereview.chromium.org//660823002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41189 260f80e4-7a28-3924-810f-c04153c831b5