Check that tab switcher is active/inactive before visibility check.

Check that tab switcher is active/inactive before visibility check.

As shown in the referenced bug, testCloseAllTabs was failing because the
stack view visibility check was checking for a nil stack view.  This is
likely occurring because the visibility check was occurring before the
touch event that should show the tab switcher is handled.  Adding this
condition will wait for the touch event to be handled before checking
for visibility.

BUG=693517
Review-Url: https://codereview.chromium.org/2706403006
Cr-Commit-Position: refs/heads/master@{#455293}
(cherry picked from commit 389418d676c37f1c98ac289da1b57b68888bd701)

Review-Url: https://codereview.chromium.org/2734283002 .
Cr-Commit-Position: refs/branch-heads/3029@{#56}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/93e9aa4f35bdab24144198126026bfd57ba6af48

[kkhorimoto, 2017-03-08 01:25:36]

Description was changed from

==========
Check that tab switcher is active/inactive before visibility check.

As shown in the referenced bug, testCloseAllTabs was failing because the
stack view visibility check was checking for a nil stack view.  This is
likely occurring because the visibility check was occurring before the
touch event that should show the tab switcher is handled.  Adding this
condition will wait for the touch event to be handled before checking
for visibility.

BUG=693517

Review-Url: https://codereview.chromium.org/2706403006
Cr-Commit-Position: refs/heads/master@{#455293}
(cherry picked from commit 389418d676c37f1c98ac289da1b57b68888bd701)
==========

to

==========
Check that tab switcher is active/inactive before visibility check.

As shown in the referenced bug, testCloseAllTabs was failing because the
stack view visibility check was checking for a nil stack view.  This is
likely occurring because the visibility check was occurring before the
touch event that should show the tab switcher is handled.  Adding this
condition will wait for the touch event to be handled before checking
for visibility.

BUG=693517

Review-Url: https://codereview.chromium.org/2706403006
Cr-Commit-Position: refs/heads/master@{#455293}
(cherry picked from commit 389418d676c37f1c98ac289da1b57b68888bd701)

Review-Url: https://codereview.chromium.org/2734283002 .
Cr-Commit-Position: refs/branch-heads/3029@{#56}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/93e9aa4f35bdab24144198126026...
==========

[kkhorimoto, 2017-03-08 01:25:37]

Committed patchset #1 (id:1) manually as
93e9aa4f35bdab24144198126026bfd57ba6af48.