Require exact match of vm arguments.

This will make sure e.g. '--verbose-gc' won't trigger '--verbose'.

BUG=
R=iposva@google.com, sgjesse@google.com

Review URL: https://codereview.chromium.org//15724022

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23845 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed