Make new scheduler the default.

This CL also add a new option '--noschedv2' to use the original
scheduler in case of bugs in the new scheduler.

Change-Id: I11ddefe7e7c1162019e9ad72ed3cef0b962b4d06
Reviewed-on: https://chrome-internal-review.googlesource.com/230484
Commit-Ready: Han Shen <shenhan@google.com>
Tested-by: Han Shen <shenhan@google.com>
Reviewed-by: Caroline Tice <cmtice@google.com>
3 files changed