Make the tab scrubber speed proportional with the number of tabs

Make the tab scrubber speed proportional with the number of tabs

When the number of tabs increases, tab scrubbing speed becomes too fast
that it's very hard to target a specific tab.

This CL makes the speed proportional with the number of tabs.

BUG=678316
TEST=When you add a lot of tabs, tab scrubbing is still easy.

Review-Url: https://codereview.chromium.org/2703373009
Cr-Commit-Position: refs/heads/master@{#452644}
Committed: https://chromium.googlesource.com/chromium/src/+/e60c7cdab72dcbf2abdea65ab7ac74ee32f112b4

[afakhry, 2017-02-23 19:21:46]

afakhry@chromium.org changed reviewers:
+ sky@chromium.org

[afakhry, 2017-02-23 19:21:47]

Sky, can you please take a look? Thank you!

[afakhry, 2017-02-23 19:22:09]

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

[commit-bot: I haz the power, 2017-02-23 19:22:46]

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, 2017-02-23 20:15:19]

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

[commit-bot: I haz the power, 2017-02-23 20:15:20]

Dry run: This issue passed the CQ dry run.

[sky, 2017-02-23 21:28:34]

LGTM

[afakhry, 2017-02-23 21:39:59]

The CQ bit was checked by afakhry@chromium.org

[commit-bot: I haz the power, 2017-02-23 21:40:37]

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, 2017-02-23 21:50:33]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487885999985320, "parent_rev":
"1776eaeda0b5a51e8fd0d400b42bb721106f6d30", "commit_rev":
"e60c7cdab72dcbf2abdea65ab7ac74ee32f112b4"}

[commit-bot: I haz the power, 2017-02-23 21:51:10]

Description was changed from

==========
Make the tab scrubber speed proportional with the number of tabs

When the number of tabs increases, tab scrubbing speed becomes too fast
that it's very hard to target a specific tab.

This CL makes the speed proportional with the number of tabs.

BUG=678316
TEST=When you add a lot of tabs, tab scrubbing is still easy.
==========

to

==========
Make the tab scrubber speed proportional with the number of tabs

When the number of tabs increases, tab scrubbing speed becomes too fast
that it's very hard to target a specific tab.

This CL makes the speed proportional with the number of tabs.

BUG=678316
TEST=When you add a lot of tabs, tab scrubbing is still easy.

Review-Url: https://codereview.chromium.org/2703373009
Cr-Commit-Position: refs/heads/master@{#452644}
Committed:
https://chromium.googlesource.com/chromium/src/+/e60c7cdab72dcbf2abdea65ab7ac...
==========

[commit-bot: I haz the power, 2017-02-23 21:51:11]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/e60c7cdab72dcbf2abdea65ab7ac...