Correct last revision

Review URL: https://codereview.chromium.org//825463002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42554 260f80e4-7a28-3924-810f-c04153c831b5
Improve generated MIPS code for conditional expressions and branches by delaying
emission of comparison code.
Improve instruction tracing in all simulators.

R=zra@google.com

Review URL: https://codereview.chromium.org//817593002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@42555 260f80e4-7a28-3924-810f-c04153c831b5