Make PnaclTranslationCacheEntry RefCountedThreadSafe

Make PnaclTranslationCacheEntry RefCountedThreadSafe

PnaclTranslationCacheEntry has a non-thread-safe ref count, and usually
bound to IO thread. However, disk_cache::BackendIO may be destroyed on
CACHE thread, and may drop a reference on it. That causes a data race
on the unprotected ref count.

BUG=688072
Review-Url: https://codereview.chromium.org/2722513002
Cr-Commit-Position: refs/heads/master@{#453248}
Committed: https://chromium.googlesource.com/chromium/src/+/393f08e143d2d7c6d84744221db39516474fb159

[tzik, 2017-02-27 09:26:20]

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

[commit-bot: I haz the power, 2017-02-27 09:26:35]

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

[tzik, 2017-02-27 09:32:18]

Description was changed from

==========
Make PnaclTranslationCacheEntry RefCountedThreadSafe

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

to

==========
Make PnaclTranslationCacheEntry RefCountedThreadSafe

PnaclTranslationCacheEntry has a non-thread-safe ref count, and usually
bound to IO thread. However, disk_cache::BackendIO may be destroyed on
CACHE thread, and may drop a reference on it. That causes a data race
on the unprotected ref count.

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

[tzik, 2017-02-27 09:32:42]

Description was changed from

==========
Make PnaclTranslationCacheEntry RefCountedThreadSafe

PnaclTranslationCacheEntry has a non-thread-safe ref count, and usually
bound to IO thread. However, disk_cache::BackendIO may be destroyed on
CACHE thread, and may drop a reference on it. That causes a data race
on the unprotected ref count.

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

to

==========
Make PnaclTranslationCacheEntry RefCountedThreadSafe

PnaclTranslationCacheEntry has a non-thread-safe ref count, and usually
bound to IO thread. However, disk_cache::BackendIO may be destroyed on
CACHE thread, and may drop a reference on it. That causes a data race
on the unprotected ref count.

BUG=688072
==========

[tzik, 2017-02-27 09:34:43]

tzik@chromium.org changed reviewers:
+ bradnelson@chromium.org

[tzik, 2017-02-27 09:34:44]

PTAL

[commit-bot: I haz the power, 2017-02-27 10:10:04]

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

[commit-bot: I haz the power, 2017-02-27 10:10:04]

Dry run: This issue passed the CQ dry run.

[bradnelson, 2017-02-27 17:45:31]

The CQ bit was checked by bradnelson@chromium.org

[bradnelson, 2017-02-27 17:45:32]

lgtm

[commit-bot: I haz the power, 2017-02-27 17:46:24]

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, 2017-02-27 17:51:46]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1488217531774460, "parent_rev":
"3b9d2510e14348d81ca532a5abe7b5cfc7d011d5", "commit_rev":
"393f08e143d2d7c6d84744221db39516474fb159"}

[commit-bot: I haz the power, 2017-02-27 17:52:35]

Description was changed from

==========
Make PnaclTranslationCacheEntry RefCountedThreadSafe

PnaclTranslationCacheEntry has a non-thread-safe ref count, and usually
bound to IO thread. However, disk_cache::BackendIO may be destroyed on
CACHE thread, and may drop a reference on it. That causes a data race
on the unprotected ref count.

BUG=688072
==========

to

==========
Make PnaclTranslationCacheEntry RefCountedThreadSafe

PnaclTranslationCacheEntry has a non-thread-safe ref count, and usually
bound to IO thread. However, disk_cache::BackendIO may be destroyed on
CACHE thread, and may drop a reference on it. That causes a data race
on the unprotected ref count.

BUG=688072

Review-Url: https://codereview.chromium.org/2722513002
Cr-Commit-Position: refs/heads/master@{#453248}
Committed:
https://chromium.googlesource.com/chromium/src/+/393f08e143d2d7c6d84744221db3...
==========

[commit-bot: I haz the power, 2017-02-27 17:52:36]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/393f08e143d2d7c6d84744221db3...