Reland of duce copying of local data structures in GeometryMapper and PaintLayerClipper.

Reland of duce copying of local data structures in GeometryMapper and PaintLayerClipper. (patchset #1 id:1 of https://codereview.chromium.org/2743733004/ )

Reason for revert:
Was likely a false alarm.

Original issue's description:
> Revert of Reduce copying of local data structures in GeometryMapper and PaintLayerClipper. (patchset #10 id:170001 of https://codereview.chromium.org/2745563004/ )
> 
> Reason for revert:
> Speculative revert, it doesn't look related but am trying changes in the blame range.
> 
> Will update if the revert has changed things / will revert the revert otherwise.
> 
> https://build.chromium.org/p/chromium.win/builders/Win10%20Tests%20x64/builds/9030
> 
> Test: SitePerProcessHighDPIExpiredCertBrowserTest.InterstitialLoadsWithCorrectDeviceScaleFactor
> 
> Original issue's description:
> > Reduce copying of local data structures in GeometryMapper and PaintLayerClipper.
> > 
> > In particular, changes return values from FloatClipRect to const FloatClipRect&,
> > to avoid extra data structure copies.
> > 
> > In local testing, this CL produces up to a 10% improvement on the
> > rasterize_and_record_micro.partial_invalidation benchmark.
> > 
> > BUG=692614
> > CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> > 
> > Review-Url: https://codereview.chromium.org/2745563004
> > Cr-Commit-Position: refs/heads/master@{#456011}
> > Committed: https://chromium.googlesource.com/chromium/src/+/05c00d2035047fa9d210d95afedf8bd063bccc33
> 
> TBR=pdr@chromium.org,wangxianzhu@chromium.org,chrishtr@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=692614
> 
> Review-Url: https://codereview.chromium.org/2743733004
> Cr-Commit-Position: refs/heads/master@{#456032}
> Committed: https://chromium.googlesource.com/chromium/src/+/a2c9dcac6e64411adf0b6f047125d5ba415cce54

TBR=pdr@chromium.org,wangxianzhu@chromium.org,chrishtr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=692614
Review-Url: https://codereview.chromium.org/2741103005
Cr-Commit-Position: refs/heads/master@{#456036}
Committed: https://chromium.googlesource.com/chromium/src/+/22a37f49e50636144bbae9d5c391d9efbf9c90a6

[kinuko, 2017-03-10 10:33:45]

The CQ bit was checked by kinuko@chromium.org

[kinuko, 2017-03-10 10:33:46]

Created Reland of duce copying of local data structures in GeometryMapper and
PaintLayerClipper.

[commit-bot: I haz the power, 2017-03-10 10:33:55]

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, 2017-03-10 10:34:45]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489142025801050, "parent_rev":
"b59f83ce70a0ab130c82b314713938d89f2c2f73", "commit_rev":
"22a37f49e50636144bbae9d5c391d9efbf9c90a6"}

[commit-bot: I haz the power, 2017-03-10 10:35:28]

Description was changed from

==========
Reland of duce copying of local data structures in GeometryMapper and
PaintLayerClipper. (patchset #1 id:1 of
https://codereview.chromium.org/2743733004/ )

Reason for revert:
Was likely a false alarm.

Original issue's description:
> Revert of Reduce copying of local data structures in GeometryMapper and
PaintLayerClipper. (patchset #10 id:170001 of
https://codereview.chromium.org/2745563004/ )
> 
> Reason for revert:
> Speculative revert, it doesn't look related but am trying changes in the blame
range.
> 
> Will update if the revert has changed things / will revert the revert
otherwise.
> 
>
https://build.chromium.org/p/chromium.win/builders/Win10%20Tests%20x64/builds...
> 
> Test:
SitePerProcessHighDPIExpiredCertBrowserTest.InterstitialLoadsWithCorrectDeviceScaleFactor
> 
> Original issue's description:
> > Reduce copying of local data structures in GeometryMapper and
PaintLayerClipper.
> > 
> > In particular, changes return values from FloatClipRect to const
FloatClipRect&,
> > to avoid extra data structure copies.
> > 
> > In local testing, this CL produces up to a 10% improvement on the
> > rasterize_and_record_micro.partial_invalidation benchmark.
> > 
> > BUG=692614
> >
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> > 
> > Review-Url: https://codereview.chromium.org/2745563004
> > Cr-Commit-Position: refs/heads/master@{#456011}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/05c00d2035047fa9d210d95afedf...
> 
> TBR=pdr@chromium.org,wangxianzhu@chromium.org,chrishtr@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=692614
> 
> Review-Url: https://codereview.chromium.org/2743733004
> Cr-Commit-Position: refs/heads/master@{#456032}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a2c9dcac6e64411adf0b6f047125...

TBR=pdr@chromium.org,wangxianzhu@chromium.org,chrishtr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=692614
==========

to

==========
Reland of duce copying of local data structures in GeometryMapper and
PaintLayerClipper. (patchset #1 id:1 of
https://codereview.chromium.org/2743733004/ )

Reason for revert:
Was likely a false alarm.

Original issue's description:
> Revert of Reduce copying of local data structures in GeometryMapper and
PaintLayerClipper. (patchset #10 id:170001 of
https://codereview.chromium.org/2745563004/ )
> 
> Reason for revert:
> Speculative revert, it doesn't look related but am trying changes in the blame
range.
> 
> Will update if the revert has changed things / will revert the revert
otherwise.
> 
>
https://build.chromium.org/p/chromium.win/builders/Win10%20Tests%20x64/builds...
> 
> Test:
SitePerProcessHighDPIExpiredCertBrowserTest.InterstitialLoadsWithCorrectDeviceScaleFactor
> 
> Original issue's description:
> > Reduce copying of local data structures in GeometryMapper and
PaintLayerClipper.
> > 
> > In particular, changes return values from FloatClipRect to const
FloatClipRect&,
> > to avoid extra data structure copies.
> > 
> > In local testing, this CL produces up to a 10% improvement on the
> > rasterize_and_record_micro.partial_invalidation benchmark.
> > 
> > BUG=692614
> >
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> > 
> > Review-Url: https://codereview.chromium.org/2745563004
> > Cr-Commit-Position: refs/heads/master@{#456011}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/05c00d2035047fa9d210d95afedf...
> 
> TBR=pdr@chromium.org,wangxianzhu@chromium.org,chrishtr@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=692614
> 
> Review-Url: https://codereview.chromium.org/2743733004
> Cr-Commit-Position: refs/heads/master@{#456032}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a2c9dcac6e64411adf0b6f047125...

TBR=pdr@chromium.org,wangxianzhu@chromium.org,chrishtr@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=692614

Review-Url: https://codereview.chromium.org/2741103005
Cr-Commit-Position: refs/heads/master@{#456036}
Committed:
https://chromium.googlesource.com/chromium/src/+/22a37f49e50636144bbae9d5c391...
==========

[commit-bot: I haz the power, 2017-03-10 10:35:31]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/22a37f49e50636144bbae9d5c391...