Revert of Move beforeunload hang timer duties to its own timer.

Revert of Move beforeunload hang timer duties to its own timer. (patchset #4 id:60001 of https://codereview.chromium.org/2727253005/ )

Reason for revert:
We're seeing reliable failures on Win7 as a result of this patch:

BrowserTest.SingleBeforeUnloadAfterRedirect

Specific error:

[6776:6744:0307/133434.182:FATAL:render_frame_host_impl.cc(2555)] Check failed: is_waiting_for_beforeunload_ack_.

Original issue's description:
> Move beforeunload hang timer duties to its own timer.
> 
> BUG=418266
> TEST=no user-visible change
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
> 
> Review-Url: https://codereview.chromium.org/2727253005
> Cr-Commit-Position: refs/heads/master@{#455140}
> Committed: https://chromium.googlesource.com/chromium/src/+/ddd4c22cebfb3be9570877a7fcfebeca24c5f83b

TBR=creis@chromium.org,dtapuska@chromium.org,avi@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=418266
Review-Url: https://codereview.chromium.org/2740493004
Cr-Commit-Position: refs/heads/master@{#455257}
Committed: https://chromium.googlesource.com/chromium/src/+/f778ca9f4a958514a2d7e5996eb6433b18410669

[tmartino, 2017-03-07 22:06:16]

The CQ bit was checked by tmartino@chromium.org

[tmartino, 2017-03-07 22:06:17]

Created Revert of Move beforeunload hang timer duties to its own timer.

[commit-bot: I haz the power, 2017-03-07 22:08:03]

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, 2017-03-07 22:34:26]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1488924376721900, "parent_rev":
"c4c73fb74bfeedbc41e0fc41f14feed642c6a86b", "commit_rev":
"f778ca9f4a958514a2d7e5996eb6433b18410669"}

[commit-bot: I haz the power, 2017-03-07 22:35:17]

Description was changed from

==========
Revert of Move beforeunload hang timer duties to its own timer. (patchset #4
id:60001 of https://codereview.chromium.org/2727253005/ )

Reason for revert:
We're seeing reliable failures on Win7 as a result of this patch:

BrowserTest.SingleBeforeUnloadAfterRedirect

Specific error:

[6776:6744:0307/133434.182:FATAL:render_frame_host_impl.cc(2555)] Check failed:
is_waiting_for_beforeunload_ack_.

Original issue's description:
> Move beforeunload hang timer duties to its own timer.
> 
> BUG=418266
> TEST=no user-visible change
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
> 
> Review-Url: https://codereview.chromium.org/2727253005
> Cr-Commit-Position: refs/heads/master@{#455140}
> Committed:
https://chromium.googlesource.com/chromium/src/+/ddd4c22cebfb3be9570877a7fcfe...

TBR=creis@chromium.org,dtapuska@chromium.org,avi@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=418266
==========

to

==========
Revert of Move beforeunload hang timer duties to its own timer. (patchset #4
id:60001 of https://codereview.chromium.org/2727253005/ )

Reason for revert:
We're seeing reliable failures on Win7 as a result of this patch:

BrowserTest.SingleBeforeUnloadAfterRedirect

Specific error:

[6776:6744:0307/133434.182:FATAL:render_frame_host_impl.cc(2555)] Check failed:
is_waiting_for_beforeunload_ack_.

Original issue's description:
> Move beforeunload hang timer duties to its own timer.
> 
> BUG=418266
> TEST=no user-visible change
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
> 
> Review-Url: https://codereview.chromium.org/2727253005
> Cr-Commit-Position: refs/heads/master@{#455140}
> Committed:
https://chromium.googlesource.com/chromium/src/+/ddd4c22cebfb3be9570877a7fcfe...

TBR=creis@chromium.org,dtapuska@chromium.org,avi@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=418266

Review-Url: https://codereview.chromium.org/2740493004
Cr-Commit-Position: refs/heads/master@{#455257}
Committed:
https://chromium.googlesource.com/chromium/src/+/f778ca9f4a958514a2d7e5996eb6...
==========

[commit-bot: I haz the power, 2017-03-07 22:35:18]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/f778ca9f4a958514a2d7e5996eb6...