Revert of Don't lower priority for scripts inserted by doc.write

Revert of Don't lower priority for scripts inserted by doc.write (patchset #5 id:70001 of https://codereview.chromium.org/2826213003/ )

Reason for revert:
The layout test was broken and racy (http://crbug.com/715528).  SHould be trivial to fix (use the same query param for the preloaded and real image) but best to revert, fix and re-land separately.

Original issue's description:
> Don't lower priority for scripts inserted by doc.write
> 
> HTML Chunks inserted by document.write() are run through a separate
> instance of the preload scanner from the main document.  If the main
> document scanner has already discovered an image then all scripts
> discovered by any preload scanner regardless of where they came from
> would be considered late-body.
> 
> This behavior causes a regression where a document.write() in the head
> that includes multiple script tags will discover them but treat them as
> late-body scripts and only load them one at a time.
> 
> BUG=713727, 712338
> 
> Review-Url: https://codereview.chromium.org/2826213003
> Cr-Commit-Position: refs/heads/master@{#467029}
> Committed: https://chromium.googlesource.com/chromium/src/+/1e0d3cbbf60c67ba9856eadcb9e829b3c4bec6c7

TBR=yoav@yoav.ws,kinuko@chromium.org,csharrison@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=713727, 712338
Review-Url: https://codereview.chromium.org/2843013002
Cr-Commit-Position: refs/heads/master@{#467310}
Committed: https://chromium.googlesource.com/chromium/src/+/7cf26442aea7fbcf8883717309287e2fc4d64639

[Pat Meenan, 2017-04-26 13:22:36]

The CQ bit was checked by pmeenan@chromium.org

[Pat Meenan, 2017-04-26 13:22:36]

Created Revert of Don't lower priority for scripts inserted by doc.write

[commit-bot: I haz the power, 2017-04-26 13:22:57]

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, 2017-04-26 13:23:37]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493212956167330, "parent_rev":
"79a8c1f3a373b60846fd2a163966b7f8e30991a6", "commit_rev":
"7cf26442aea7fbcf8883717309287e2fc4d64639"}

[commit-bot: I haz the power, 2017-04-26 13:23:48]

Description was changed from

==========
Revert of Don't lower priority for scripts inserted by doc.write (patchset #5
id:70001 of https://codereview.chromium.org/2826213003/ )

Reason for revert:
The layout test was broken and racy (http://crbug.com/715528).  SHould be
trivial to fix (use the same query param for the preloaded and real image) but
best to revert, fix and re-land separately.

Original issue's description:
> Don't lower priority for scripts inserted by doc.write
> 
> HTML Chunks inserted by document.write() are run through a separate
> instance of the preload scanner from the main document.  If the main
> document scanner has already discovered an image then all scripts
> discovered by any preload scanner regardless of where they came from
> would be considered late-body.
> 
> This behavior causes a regression where a document.write() in the head
> that includes multiple script tags will discover them but treat them as
> late-body scripts and only load them one at a time.
> 
> BUG=713727,712338
> 
> Review-Url: https://codereview.chromium.org/2826213003
> Cr-Commit-Position: refs/heads/master@{#467029}
> Committed:
https://chromium.googlesource.com/chromium/src/+/1e0d3cbbf60c67ba9856eadcb9e8...

TBR=yoav@yoav.ws,kinuko@chromium.org,csharrison@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=713727,712338
==========

to

==========
Revert of Don't lower priority for scripts inserted by doc.write (patchset #5
id:70001 of https://codereview.chromium.org/2826213003/ )

Reason for revert:
The layout test was broken and racy (http://crbug.com/715528).  SHould be
trivial to fix (use the same query param for the preloaded and real image) but
best to revert, fix and re-land separately.

Original issue's description:
> Don't lower priority for scripts inserted by doc.write
> 
> HTML Chunks inserted by document.write() are run through a separate
> instance of the preload scanner from the main document.  If the main
> document scanner has already discovered an image then all scripts
> discovered by any preload scanner regardless of where they came from
> would be considered late-body.
> 
> This behavior causes a regression where a document.write() in the head
> that includes multiple script tags will discover them but treat them as
> late-body scripts and only load them one at a time.
> 
> BUG=713727,712338
> 
> Review-Url: https://codereview.chromium.org/2826213003
> Cr-Commit-Position: refs/heads/master@{#467029}
> Committed:
https://chromium.googlesource.com/chromium/src/+/1e0d3cbbf60c67ba9856eadcb9e8...

TBR=yoav@yoav.ws,kinuko@chromium.org,csharrison@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=713727,712338

Review-Url: https://codereview.chromium.org/2843013002
Cr-Commit-Position: refs/heads/master@{#467310}
Committed:
https://chromium.googlesource.com/chromium/src/+/7cf26442aea7fbcf888371730928...
==========

[commit-bot: I haz the power, 2017-04-26 13:23:49]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/7cf26442aea7fbcf888371730928...