Use a create-or-update pattern for faster local border box property updates

Use a create-or-update pattern for faster local border box property updates

This patch switches to a create-or-update pattern for paint property
updates of the local border box. This is a 6% improvement on
large-table-collapsed-border-change-with-text [1].

[1] tools/perf/run_benchmark blink_perf.paint --browser=content-shell-release --pageset-repeat=5 --extra-browser-args=--enable-slimming-paint-v2

BUG=645667
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Committed: https://crrev.com/3f4b3cca5da1170fc860d3008403c7997901f6f3
Cr-Commit-Position: refs/heads/master@{#435546}

[pdr., 2016-12-01 01:05:33]

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

[commit-bot: I haz the power, 2016-12-01 01:06:29]

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, 2016-12-01 02:28:26]

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

[commit-bot: I haz the power, 2016-12-01 02:28:27]

Dry run: This issue passed the CQ dry run.

[pdr., 2016-12-01 03:32:29]

pdr@chromium.org changed reviewers:
+ chrishtr@chromium.org, trchen@chromium.org, wangxianzhu@chromium.org

[chrishtr, 2016-12-01 03:36:32]

The CQ bit was checked by chrishtr@chromium.org

[chrishtr, 2016-12-01 03:36:32]

lgtm

[commit-bot: I haz the power, 2016-12-01 03:36:48]

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, 2016-12-01 03:40:51]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480563392407190, "parent_rev":
"6ba8e39e57c1f2168daff77209271b38b6b2356c", "commit_rev":
"1e7377b3238e0c1200ed9748e0f6c82990788610"}

[commit-bot: I haz the power, 2016-12-01 03:41:19]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-12-01 03:43:46]

Description was changed from

==========
Use a create-or-update pattern for faster local border box property updates

This patch switches to a create-or-update pattern for paint property
updates of the local border box. This is a 6% improvement on
large-table-collapsed-border-change-with-text [1].

[1] tools/perf/run_benchmark blink_perf.paint --browser=content-shell-release
--pageset-repeat=5 --extra-browser-args=--enable-slimming-paint-v2

BUG=645667
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

to

==========
Use a create-or-update pattern for faster local border box property updates

This patch switches to a create-or-update pattern for paint property
updates of the local border box. This is a 6% improvement on
large-table-collapsed-border-change-with-text [1].

[1] tools/perf/run_benchmark blink_perf.paint --browser=content-shell-release
--pageset-repeat=5 --extra-browser-args=--enable-slimming-paint-v2

BUG=645667
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Committed: https://crrev.com/3f4b3cca5da1170fc860d3008403c7997901f6f3
Cr-Commit-Position: refs/heads/master@{#435546}
==========

[commit-bot: I haz the power, 2016-12-01 03:43:47]

Patchset 1 (id:??) landed as
https://crrev.com/3f4b3cca5da1170fc860d3008403c7997901f6f3
Cr-Commit-Position: refs/heads/master@{#435546}