Use baseline code to compute message locations.

Use baseline code to compute message locations.

This switches Isolate::ComputeLocation to use baseline code when
computing message locations. This unifies locations between optimized
and non-optimized code by always going through the FrameSummary for
location computation.

R=bmeurer@chromium.org
TEST=message/regress/regress-4266
BUG=v8:4266
LOG=n

Committed: https://crrev.com/819b40aae84111592ea524fd045037463e571838
Cr-Commit-Position: refs/heads/master@{#30635}

[Michael Starzinger, 2015-09-08 13:38:41]

mstarzinger@chromium.org changed reviewers:
+ bmeurer@chromium.org

[Benedikt Meurer, 2015-09-08 13:41:28]

Awesome! LGTM

[Michael Starzinger, 2015-09-08 14:00:09]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2015-09-08 14:00:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1331603002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1331603002/40001

[commit-bot: I haz the power, 2015-09-08 14:14:57]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-09-08 14:15:12]

Patchset 3 (id:??) landed as
https://crrev.com/819b40aae84111592ea524fd045037463e571838
Cr-Commit-Position: refs/heads/master@{#30635}