Revert of Add TabContainer to Showcase

Revert of Add TabContainer to Showcase (patchset #2 id:20001 of https://codereview.chromium.org/2764063002/ )

Reason for revert:
Caused internal bots failures.

Original issue's description:
> Add TabContainer to Showcase
> 
> BUG=none
> R=edchin@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2764063002
> Cr-Commit-Position: refs/heads/master@{#458679}
> Committed: https://chromium.googlesource.com/chromium/src/+/4a3404fa73477039a8b9b21be0bc5a5e26d4b290

TBR=edchin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

Review-Url: https://codereview.chromium.org/2766233002
Cr-Commit-Position: refs/heads/master@{#458772}
Committed: https://chromium.googlesource.com/chromium/src/+/96bce3e41fb2611184a4616cebc614bc037fa4c8

[lpromero, 2017-03-22 16:29:06]

The CQ bit was checked by lpromero@chromium.org

[lpromero, 2017-03-22 16:29:07]

Created Revert of Add TabContainer to Showcase

[commit-bot: I haz the power, 2017-03-22 16:29:24]

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, 2017-03-22 16:30:14]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490200146721480, "parent_rev":
"2ff5d34ac279f8077dbcabe4afe21bbb964a4894", "commit_rev":
"96bce3e41fb2611184a4616cebc614bc037fa4c8"}

[commit-bot: I haz the power, 2017-03-22 16:31:04]

Description was changed from

==========
Revert of Add TabContainer to Showcase (patchset #2 id:20001 of
https://codereview.chromium.org/2764063002/ )

Reason for revert:
Caused internal bots failures.

Original issue's description:
> Add TabContainer to Showcase
> 
> BUG=none
> R=edchin@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2764063002
> Cr-Commit-Position: refs/heads/master@{#458679}
> Committed:
https://chromium.googlesource.com/chromium/src/+/4a3404fa73477039a8b9b21be0bc...

TBR=edchin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none
==========

to

==========
Revert of Add TabContainer to Showcase (patchset #2 id:20001 of
https://codereview.chromium.org/2764063002/ )

Reason for revert:
Caused internal bots failures.

Original issue's description:
> Add TabContainer to Showcase
> 
> BUG=none
> R=edchin@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2764063002
> Cr-Commit-Position: refs/heads/master@{#458679}
> Committed:
https://chromium.googlesource.com/chromium/src/+/4a3404fa73477039a8b9b21be0bc...

TBR=edchin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

Review-Url: https://codereview.chromium.org/2766233002
Cr-Commit-Position: refs/heads/master@{#458772}
Committed:
https://chromium.googlesource.com/chromium/src/+/96bce3e41fb2611184a4616cebc6...
==========

[commit-bot: I haz the power, 2017-03-22 16:31:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/96bce3e41fb2611184a4616cebc6...