Timeline: fix overlapping group headers in Flame Chart

Timeline: fix overlapping group headers in Flame Chart

This fixes a corner case of group header rendering where
we've computed group visibility wrong due to starting from
non-top level group because of clipping. This patch
simplifies logic to always traverse through all groups.

BUG=595973
Committed: https://crrev.com/7db9ea7c5e05f1d82c6389eb7c9c23f17548c967
Cr-Commit-Position: refs/heads/master@{#382178}

[caseq, 2016-03-18 22:18:20]

Description was changed from

==========
Timeline: fix overlapping group headers in Flame Chart

This fixes a corner case of group header rendering where we've computed
group visibilirt wrong due to starting from non-top level group because
of clipping. This patch simplifies logic to always traverse through all
groups.
==========

to

==========
Timeline: fix overlapping group headers in Flame Chart

This fixes a corner case of group header rendering where 
we've computed group visibility wrong due to starting from 
non-top level group because of clipping. This patch 
simplifies logic to always traverse through all groups.

BUG=595973
==========

[caseq, 2016-03-18 22:18:21]

caseq@chromium.org changed reviewers:
+ alph@chromium.org

[alph, 2016-03-19 03:06:21]

The CQ bit was checked by alph@chromium.org

[alph, 2016-03-19 03:06:22]

lgtm

[commit-bot: I haz the power, 2016-03-19 03:06:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1813813005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1813813005/1

[commit-bot: I haz the power, 2016-03-19 04:18:12]

Description was changed from

==========
Timeline: fix overlapping group headers in Flame Chart

This fixes a corner case of group header rendering where 
we've computed group visibility wrong due to starting from 
non-top level group because of clipping. This patch 
simplifies logic to always traverse through all groups.

BUG=595973
==========

to

==========
Timeline: fix overlapping group headers in Flame Chart

This fixes a corner case of group header rendering where 
we've computed group visibility wrong due to starting from 
non-top level group because of clipping. This patch 
simplifies logic to always traverse through all groups.

BUG=595973
==========

[commit-bot: I haz the power, 2016-03-19 04:18:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-19 04:42:15]

Description was changed from

==========
Timeline: fix overlapping group headers in Flame Chart

This fixes a corner case of group header rendering where 
we've computed group visibility wrong due to starting from 
non-top level group because of clipping. This patch 
simplifies logic to always traverse through all groups.

BUG=595973
==========

to

==========
Timeline: fix overlapping group headers in Flame Chart

This fixes a corner case of group header rendering where
we've computed group visibility wrong due to starting from
non-top level group because of clipping. This patch
simplifies logic to always traverse through all groups.

BUG=595973

Committed: https://crrev.com/7db9ea7c5e05f1d82c6389eb7c9c23f17548c967
Cr-Commit-Position: refs/heads/master@{#382178}
==========

[commit-bot: I haz the power, 2016-03-19 04:42:16]

Patchset 1 (id:??) landed as
https://crrev.com/7db9ea7c5e05f1d82c6389eb7c9c23f17548c967
Cr-Commit-Position: refs/heads/master@{#382178}