Revert "Revert "Add a baseline flag to JIT compile.""

This reverts commit 344b0d18eb9f9f2f2ef704acadc510a6dd56a282.

Reason for revert: Not the CL that broke the tests.

Change-Id: I38221d1ac723e5ea71cb398401e2fda8dd2d7db9
8 files changed