GitLab

This reverts commit 50439b88.

Reason for revert:
Mac bots start failing after this CL on HungRendererControllerTest.
The error logs are below.
https://ci.chromium.org/p/chromium/builders/luci.chromium.ci/Mac10.11%20Tests/29038
https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8934838111834185888/+/steps/unit_tests_on__none__GPU_on_Mac_on_Mac-10.11/0/logs/HungRendererControllerTest.TestKillButton/0

Original change's description:
> mac: Remove unused TabDialogsMac/TabDialogsCocoa.
> 
> Bug: 832676
> Change-Id: I0fb8d4b1f0197dab0b988a52741724f63a18ee9f
> Reviewed-on: https://chromium-review.googlesource.com/1236178
> Commit-Queue: Nico Weber <thakis@chromium.org>
> Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#592819}

TBR=ellyjones@chromium.org,thakis@chromium.org

Change-Id: I6554e741ef31bc99da0c90e3c4fd2bb8826a741f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 832676
Reviewed-on: https://chromium-review.googlesource.com/1237797Reviewed-by: Taiju Tsuiki <tzik@chromium.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593085}