Stop calling blink::shutdown in content/ tests

Stop calling blink::shutdown in content/ tests

As discussed in blink-dev@ (https://groups.google.com/a/chromium.org/d/topic/blink-dev/kk4VX0xRB7I/discussion)
and platform-architecture-dev@ (https://groups.google.com/a/chromium.org/d/topic/platform-architecture-dev/Zc12k91NTFk/discussion),
there is no reason we have to shut down the renderer gracefully.
It's just causing use-after-free bugs and wasting performance.
This CL stops calling blink::shutdown in content/ tests.

BUG=639244
Committed: https://crrev.com/5ef6c507623ec9b9536f2912bf3fb53244cd0601
Cr-Commit-Position: refs/heads/master@{#414234}

[haraken, 2016-08-24 05:50:44]

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

[commit-bot: I haz the power, 2016-08-24 05:51:22]

Dry run: 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, 2016-08-24 06:47:29]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-24 06:47:30]

Dry run: This issue passed the CQ dry run.

[haraken, 2016-08-24 06:58:00]

haraken@chromium.org changed reviewers:
+ jam@chromium.org, jochen@chromium.org

[haraken, 2016-08-24 06:58:01]

PTAL. All tests pass.

This is the last place blink::shutdown is used. Once I land this CL, I can
remove Blink's shutdown sequence entirely.

[jam, 2016-08-24 16:17:17]

lgtm

[haraken, 2016-08-24 22:48:30]

The CQ bit was checked by haraken@chromium.org

[commit-bot: I haz the power, 2016-08-24 22:49:07]

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, 2016-08-25 00:56:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-25 00:58:59]

Description was changed from

==========
Stop calling blink::shutdown in content/ tests

As discussed in blink-dev@
(https://groups.google.com/a/chromium.org/d/topic/blink-dev/kk4VX0xRB7I/discus...)
and platform-architecture-dev@
(https://groups.google.com/a/chromium.org/d/topic/platform-architecture-dev/Zc...),
there is no reason we have to shut down the renderer gracefully.
It's just causing use-after-free bugs and wasting performance.
This CL stops calling blink::shutdown in content/ tests.

BUG=639244
==========

to

==========
Stop calling blink::shutdown in content/ tests

As discussed in blink-dev@
(https://groups.google.com/a/chromium.org/d/topic/blink-dev/kk4VX0xRB7I/discus...)
and platform-architecture-dev@
(https://groups.google.com/a/chromium.org/d/topic/platform-architecture-dev/Zc...),
there is no reason we have to shut down the renderer gracefully.
It's just causing use-after-free bugs and wasting performance.
This CL stops calling blink::shutdown in content/ tests.

BUG=639244

Committed: https://crrev.com/5ef6c507623ec9b9536f2912bf3fb53244cd0601
Cr-Commit-Position: refs/heads/master@{#414234}
==========

[commit-bot: I haz the power, 2016-08-25 00:59:00]

Patchset 1 (id:??) landed as
https://crrev.com/5ef6c507623ec9b9536f2912bf3fb53244cd0601
Cr-Commit-Position: refs/heads/master@{#414234}