In Isolate::Throw, call PredictExceptionCatcher only if necessary.

In Isolate::Throw, call PredictExceptionCatcher only if necessary.

This reverts an unintended change that was part of my recent CL
(https://codereview.chromium.org/2203803002).

BUG=

Committed: https://crrev.com/9ab456d65bf3b769ee54e416477db8353f869a3e
Cr-Commit-Position: refs/heads/master@{#38334}

[neis, 2016-08-04 08:47:02]

neis@chromium.org changed reviewers:
+ yangguo@chromium.org

[neis, 2016-08-04 08:47:03]

ptal

[Yang, 2016-08-04 08:58:02]

On 2016/08/04 08:47:03, neis wrote:
> ptal

lgtm.

[neis, 2016-08-04 08:59:40]

The CQ bit was checked by neis@chromium.org

[commit-bot: I haz the power, 2016-08-04 08:59:46]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-04 09:23:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-04 09:24:18]

Description was changed from

==========
In Isolate::Throw, call PredictExceptionCatcher only if necessary.

This reverts an unintended change that was part of my recent CL
(https://codereview.chromium.org/2203803002).

BUG=
==========

to

==========
In Isolate::Throw, call PredictExceptionCatcher only if necessary.

This reverts an unintended change that was part of my recent CL
(https://codereview.chromium.org/2203803002).

BUG=

Committed: https://crrev.com/9ab456d65bf3b769ee54e416477db8353f869a3e
Cr-Commit-Position: refs/heads/master@{#38334}
==========

[commit-bot: I haz the power, 2016-08-04 09:24:19]

Patchset 1 (id:??) landed as
https://crrev.com/9ab456d65bf3b769ee54e416477db8353f869a3e
Cr-Commit-Position: refs/heads/master@{#38334}