Port c1925690

Original Commit Message:

    We expect no GC between the call to UnwindAndFindHandler and
    the call to that handler. We can precalculate the handler entrypoint
    and then let the CEntryStub just load and call that address.

    The main motivation for this change is the wasm on the native heap
    work, and making the CEntryStub able to work with non- Code* values.

R=mtrofin@chromium.org, mstarzinger@chromium.org, bradnelson@chromium.org, titzer@chromium.org, joransiu@ca.ibm.com, bjaideep@ca.ibm.com, michael_dawson@ca.ibm.com

Change-Id: I139fddabef9f601b46dac9011db3ab8e01e3346d
Reviewed-on: https://chromium-review.googlesource.com/752483Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#49107}