Include -fsanitize=float-cast-overflow in is_ubsan=true builds.

Include -fsanitize=float-cast-overflow in is_ubsan=true builds.

Also add a comment about the current state of ubsan.

BUG=669642
Committed: https://crrev.com/2e147959b92ac70c0eb3e0568ae664d39614b68c
Cr-Commit-Position: refs/heads/master@{#436093}

[Nico, 2016-12-02 22:39:46]

Description was changed from

==========
Include -fsanitize=float-cast-overflow in is_ubsan=true builds.

BUG=669642
==========

to

==========
Include -fsanitize=float-cast-overflow in is_ubsan=true builds.

Also add a comment about the current state of ubsan.

BUG=669642
==========

[Nico, 2016-12-02 22:39:58]

thakis@chromium.org changed reviewers:
+ krasin@chromium.org

[Nico, 2016-12-02 22:40:02]

The CQ bit was checked by thakis@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-12-02 22:40:37]

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

[krasin1, 2016-12-02 22:42:36]

LGTM

[Nico, 2016-12-02 22:42:48]

The CQ bit was unchecked by thakis@chromium.org

[Nico, 2016-12-02 22:42:52]

The CQ bit was checked by thakis@chromium.org

[commit-bot: I haz the power, 2016-12-02 22:43:29]

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, 2016-12-03 00:19:15]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480718572749390, "parent_rev":
"e55ed9882b2397919385f6a4ab434af46c8e95ae", "commit_rev":
"cb7e5e3c88e24155bf0e65aed75d7f1b6c60fc5a"}

[commit-bot: I haz the power, 2016-12-03 00:19:40]

Description was changed from

==========
Include -fsanitize=float-cast-overflow in is_ubsan=true builds.

Also add a comment about the current state of ubsan.

BUG=669642
==========

to

==========
Include -fsanitize=float-cast-overflow in is_ubsan=true builds.

Also add a comment about the current state of ubsan.

BUG=669642
==========

[commit-bot: I haz the power, 2016-12-03 00:19:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-03 00:23:22]

Description was changed from

==========
Include -fsanitize=float-cast-overflow in is_ubsan=true builds.

Also add a comment about the current state of ubsan.

BUG=669642
==========

to

==========
Include -fsanitize=float-cast-overflow in is_ubsan=true builds.

Also add a comment about the current state of ubsan.

BUG=669642

Committed: https://crrev.com/2e147959b92ac70c0eb3e0568ae664d39614b68c
Cr-Commit-Position: refs/heads/master@{#436093}
==========

[commit-bot: I haz the power, 2016-12-03 00:23:23]

Patchset 1 (id:??) landed as
https://crrev.com/2e147959b92ac70c0eb3e0568ae664d39614b68c
Cr-Commit-Position: refs/heads/master@{#436093}

[Nico, 2016-12-21 22:14:57]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2598813002/ by thakis@chromium.org.

The reason for reverting is: Somewhat speculative; it looks like clusterfuzz
might use this list and filed many many float overflow bugs
(https://bugs.chromium.org/p/chromium/issues/list?can=2&q=%22Float-cast-overfl...).
While we should fix all those, doing so by letting clusterfuzz file close to a
hundred bugs assigned to random people isn't the way we should go about it, and
CF filing all this bugs wasn't intended when I wrote this CL..