Speed up LayoutTests/fast/text/find-backwards.html

Speed up LayoutTests/fast/text/find-backwards.html

Speed up the fast/text/find-backwards.html layout test and convert it to
use the new web platform test testharness.

BUG=725588
R=dgrogan@chromium.org

Review-Url: https://codereview.chromium.org/2905013004
Cr-Commit-Position: refs/heads/master@{#474821}
Committed: https://chromium.googlesource.com/chromium/src/+/98a2c5c6af2a6b5d0d81cb846e8bdaf66da7dae9

[eae, 2017-05-25 21:05:33]

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

[commit-bot: I haz the power, 2017-05-25 21:06:40]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[dgrogan, 2017-05-25 21:10:54]

What's the secret sauce here -- where does the speedup come from? That's where
I'll look close.

[eae, 2017-05-25 21:11:48]

On 2017/05/25 21:10:54, dgrogan wrote:
> What's the secret sauce here -- where does the speedup come from? That's where
> I'll look close.

Only recreating the text node when needed (instead of for each individual
search) and not doing quite as many similar iterations.

[dgrogan, 2017-05-25 21:54:00]

lgtm

[eae, 2017-05-25 21:59:58]

The CQ bit was unchecked by eae@chromium.org

[eae, 2017-05-25 22:00:01]

The CQ bit was checked by eae@chromium.org

[commit-bot: I haz the power, 2017-05-25 22:00:27]

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, 2017-05-25 22:30:22]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1495749601555590, "parent_rev":
"ec088ba99ee7b85f41027e95751c644b49e7e20c", "commit_rev":
"98a2c5c6af2a6b5d0d81cb846e8bdaf66da7dae9"}

[commit-bot: I haz the power, 2017-05-25 22:30:42]

Description was changed from

==========
Speed up LayoutTests/fast/text/find-backwards.html

Speed up the fast/text/find-backwards.html layout test and convert it to
use the new web platform test testharness.

BUG=725588
R=dgrogan@chromium.org
==========

to

==========
Speed up LayoutTests/fast/text/find-backwards.html

Speed up the fast/text/find-backwards.html layout test and convert it to
use the new web platform test testharness.

BUG=725588
R=dgrogan@chromium.org

Review-Url: https://codereview.chromium.org/2905013004
Cr-Commit-Position: refs/heads/master@{#474821}
Committed:
https://chromium.googlesource.com/chromium/src/+/98a2c5c6af2a6b5d0d81cb846e8b...
==========

[commit-bot: I haz the power, 2017-05-25 22:30:43]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/98a2c5c6af2a6b5d0d81cb846e8b...