Revert of WTF: Implement explicit RefPtr::operator bool.

Revert of WTF: Implement explicit RefPtr::operator bool. (patchset #2 id:20001 of https://codereview.chromium.org/1891473002/ )

Reason for revert:
Possible cause of performance regressions, somehow?
https://bugs.chromium.org/p/chromium/issues/detail?id=605080

Original issue's description:
> WTF: Implement explicit RefPtr::operator bool.
>
> This is the modern alternative to the "safe bool" idiom. Some changes at
> call sites are required, primarily because returning a boolean does not
> cause an explicit conversion.

TBR=thakis@chromium.org,yutak@chromium.org,sigbjornf@opera.com
BUG=605080
# Not skipping CQ checks because original CL landed more than 1 days ago.

Committed: https://crrev.com/1f735b48f731259f08b4fd7d46da0bfba5cb0911
Cr-Commit-Position: refs/heads/master@{#389192}

[jbroman, 2016-04-22 17:36:18]

Created Revert of WTF: Implement explicit RefPtr::operator bool.

[jbroman, 2016-04-22 17:36:33]

Description was changed from

==========
Revert of WTF: Implement explicit RefPtr::operator bool. (patchset #2 id:20001
of https://codereview.chromium.org/1891473002/ )

Reason for revert:
Possible cause of performance regressions, somehow?
https://bugs.chromium.org/p/chromium/issues/detail?id=605080

Original issue's description:
> WTF: Implement explicit RefPtr::operator bool.
> 
> This is the modern alternative to the "safe bool" idiom. Some changes at
> call sites are required, primarily because returning a boolean does not
> cause an explicit conversion.

TBR=thakis@chromium.org,yutak@chromium.org,sigbjornf@opera.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
==========

to

==========
Revert of WTF: Implement explicit RefPtr::operator bool. (patchset #2 id:20001
of https://codereview.chromium.org/1891473002/ )

Reason for revert:
Possible cause of performance regressions, somehow?
https://bugs.chromium.org/p/chromium/issues/detail?id=605080

Original issue's description:
> WTF: Implement explicit RefPtr::operator bool.
> 
> This is the modern alternative to the "safe bool" idiom. Some changes at
> call sites are required, primarily because returning a boolean does not
> cause an explicit conversion.

TBR=thakis@chromium.org,yutak@chromium.org,sigbjornf@opera.com
BUG=605080
# Not skipping CQ checks because original CL landed more than 1 days ago.
==========

[commit-bot: I haz the power, 2016-04-22 17:36:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1912203002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1912203002/1

[commit-bot: I haz the power, 2016-04-22 18:01:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1912203002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1912203002/1

[Nico, 2016-04-22 18:30:44]

wow, that'd be surprising. i'm curious if this helps.

[commit-bot: I haz the power, 2016-04-22 18:32:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1912203002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1912203002/1

[commit-bot: I haz the power, 2016-04-22 18:59:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-22 19:50:47]

Description was changed from

==========
Revert of WTF: Implement explicit RefPtr::operator bool. (patchset #2 id:20001
of https://codereview.chromium.org/1891473002/ )

Reason for revert:
Possible cause of performance regressions, somehow?
https://bugs.chromium.org/p/chromium/issues/detail?id=605080

Original issue's description:
> WTF: Implement explicit RefPtr::operator bool.
> 
> This is the modern alternative to the "safe bool" idiom. Some changes at
> call sites are required, primarily because returning a boolean does not
> cause an explicit conversion.

TBR=thakis@chromium.org,yutak@chromium.org,sigbjornf@opera.com
BUG=605080
# Not skipping CQ checks because original CL landed more than 1 days ago.
==========

to

==========
Revert of WTF: Implement explicit RefPtr::operator bool. (patchset #2 id:20001
of https://codereview.chromium.org/1891473002/ )

Reason for revert:
Possible cause of performance regressions, somehow?
https://bugs.chromium.org/p/chromium/issues/detail?id=605080

Original issue's description:
> WTF: Implement explicit RefPtr::operator bool.
>
> This is the modern alternative to the "safe bool" idiom. Some changes at
> call sites are required, primarily because returning a boolean does not
> cause an explicit conversion.

TBR=thakis@chromium.org,yutak@chromium.org,sigbjornf@opera.com
BUG=605080
# Not skipping CQ checks because original CL landed more than 1 days ago.

Committed: https://crrev.com/1f735b48f731259f08b4fd7d46da0bfba5cb0911
Cr-Commit-Position: refs/heads/master@{#389192}
==========

[commit-bot: I haz the power, 2016-04-22 19:50:49]

Patchset 1 (id:??) landed as
https://crrev.com/1f735b48f731259f08b4fd7d46da0bfba5cb0911
Cr-Commit-Position: refs/heads/master@{#389192}