Migrate expensive referrer CHECK to DCHECK in FrameFetchContext

Migrate expensive referrer CHECK to DCHECK in FrameFetchContext

Profiles on linux show this accounts for ~3.5% of the CPU cost of
requesting a resource. This check is important for security, but as
jochen@ notes in the linked bug, we do the check in the network stack
as well.

BUG=683319
Review-Url: https://codereview.chromium.org/2645043004
Cr-Commit-Position: refs/heads/master@{#445386}
Committed: https://chromium.googlesource.com/chromium/src/+/7f2447403881449544e449c595cad4287b835971

[Charlie Harrison, 2017-01-20 20:16:24]

Description was changed from

==========
Migrate expensive referrer CHECK to DCHECK in FrameFetchContext

Profiles on linux show this accounts for ~3.5% of the CPU cost of
requesting a resource. This check is important for security, but as
the linked bug says, we do the check in the network stack as well.

BUG=683319
==========

to

==========
Migrate expensive referrer CHECK to DCHECK in FrameFetchContext

Profiles on linux show this accounts for ~3.5% of the CPU cost of
requesting a resource. This check is important for security, but as
jochen@ notes in the linked bug, we do the check in the network stack
as well.

BUG=683319
==========

[Charlie Harrison, 2017-01-20 20:16:40]

csharrison@chromium.org changed reviewers:
+ jochen@chromium.org

[Charlie Harrison, 2017-01-20 20:16:41]

jochen: PTAL? Thanks for your quick response on the bug.

[Charlie Harrison, 2017-01-20 20:51:12]

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

[commit-bot: I haz the power, 2017-01-20 20:51:39]

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, 2017-01-20 22:21:27]

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

[commit-bot: I haz the power, 2017-01-20 22:21:28]

Dry run: This issue passed the CQ dry run.

[jochen (gone - plz use gerrit), 2017-01-23 08:33:28]

lgtm

[Charlie Harrison, 2017-01-23 12:55:18]

The CQ bit was checked by csharrison@chromium.org

[commit-bot: I haz the power, 2017-01-23 12:55:36]

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, 2017-01-23 16:33:06]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485176118287970, "parent_rev":
"862ae960ab1fdb4503cd99398f7211473f1134f3", "commit_rev":
"7f2447403881449544e449c595cad4287b835971"}

[commit-bot: I haz the power, 2017-01-23 16:33:34]

Description was changed from

==========
Migrate expensive referrer CHECK to DCHECK in FrameFetchContext

Profiles on linux show this accounts for ~3.5% of the CPU cost of
requesting a resource. This check is important for security, but as
jochen@ notes in the linked bug, we do the check in the network stack
as well.

BUG=683319
==========

to

==========
Migrate expensive referrer CHECK to DCHECK in FrameFetchContext

Profiles on linux show this accounts for ~3.5% of the CPU cost of
requesting a resource. This check is important for security, but as
jochen@ notes in the linked bug, we do the check in the network stack
as well.

BUG=683319

Review-Url: https://codereview.chromium.org/2645043004
Cr-Commit-Position: refs/heads/master@{#445386}
Committed:
https://chromium.googlesource.com/chromium/src/+/7f2447403881449544e449c595ca...
==========

[commit-bot: I haz the power, 2017-01-23 16:33:35]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/7f2447403881449544e449c595ca...