Revert of clang/win: Enable -Wunused-value completely.

Revert of clang/win: Enable -Wunused-value completely. (patchset #3 id:40001 of https://codereview.chromium.org/1500783002/ )

Reason for revert:
This works in debug builds but not in release builds yet.

Original issue's description:
> clang/win: Enable -Wunused-value completely.
>
> BUG=505318
> NOTRY=true
>
> Committed: https://crrev.com/b10a7ada601a07866d50cd13c6af4605e316152e
> Cr-Commit-Position: refs/heads/master@{#363327}

TBR=hans@chromium.org,wfh@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=505318
Committed: https://crrev.com/9f1715d0cd8bb5c2bcfd00c55aff80e3fb0b7caf
Cr-Commit-Position: refs/heads/master@{#363331}

[Nico, 2015-12-05 02:35:13]

Created Revert of clang/win: Enable -Wunused-value completely.

[commit-bot: I haz the power, 2015-12-05 02:38:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1501153002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1501153002/1

[commit-bot: I haz the power, 2015-12-05 02:42:58]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-12-05 02:43:57]

Description was changed from

==========
Revert of clang/win: Enable -Wunused-value completely. (patchset #3 id:40001 of
https://codereview.chromium.org/1500783002/ )

Reason for revert:
This works in debug builds but not in release builds yet.

Original issue's description:
> clang/win: Enable -Wunused-value completely.
> 
> BUG=505318
> NOTRY=true
> 
> Committed: https://crrev.com/b10a7ada601a07866d50cd13c6af4605e316152e
> Cr-Commit-Position: refs/heads/master@{#363327}

TBR=hans@chromium.org,wfh@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=505318
==========

to

==========
Revert of clang/win: Enable -Wunused-value completely. (patchset #3 id:40001 of
https://codereview.chromium.org/1500783002/ )

Reason for revert:
This works in debug builds but not in release builds yet.

Original issue's description:
> clang/win: Enable -Wunused-value completely.
>
> BUG=505318
> NOTRY=true
>
> Committed: https://crrev.com/b10a7ada601a07866d50cd13c6af4605e316152e
> Cr-Commit-Position: refs/heads/master@{#363327}

TBR=hans@chromium.org,wfh@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=505318

Committed: https://crrev.com/9f1715d0cd8bb5c2bcfd00c55aff80e3fb0b7caf
Cr-Commit-Position: refs/heads/master@{#363331}
==========

[commit-bot: I haz the power, 2015-12-05 02:43:58]

Patchset 1 (id:??) landed as
https://crrev.com/9f1715d0cd8bb5c2bcfd00c55aff80e3fb0b7caf
Cr-Commit-Position: refs/heads/master@{#363331}

[Nico, 2015-12-07 22:47:56]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1507113002/ by thakis@chromium.org.

The reason for reverting is: This might now work in release builds too..