Integrate the Irregexp Regular Expression Engine.

BUG=http://dartbug.com/19090
R=fschneider@google.com

Review URL: https://codereview.chromium.org//744853003

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41949 260f80e4-7a28-3924-810f-c04153c831b5
Revert "Integrate the Irregexp Regular Expression Engine."

This reverts commit https://code.google.com/p/dart/source/detail?r=41949

TBR=fschneider@google.com
BUG=

Review URL: https://codereview.chromium.org//754383002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41950 260f80e4-7a28-3924-810f-c04153c831b5
Checked mode fixes.

R=johnniwinther@google.com

Review URL: https://codereview.chromium.org//750653002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41951 260f80e4-7a28-3924-810f-c04153c831b5
Cache HttpRequest in test.

R=johnniwinther@google.com

Review URL: https://codereview.chromium.org//752673002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41952 260f80e4-7a28-3924-810f-c04153c831b5
Incremental compilation of removed fields.

R=johnniwinther@google.com

Review URL: https://codereview.chromium.org//742043002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41953 260f80e4-7a28-3924-810f-c04153c831b5