The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f61958a3d0125bc8848164c5dc6157e2c08738ae

commit f61958a3d0125bc8848164c5dc6157e2c08738ae
Author: shrike <shrike@chromium.org>
Date: Wed Jun 29 01:53:05 2016

[Mac][Material Design] Use white tab spinner for dark themes.

In Material Design we display a white tab spinner for Incognito mode
tabs, but we need to also do so for dark themes.

R=avi@chromium.org
BUG= 624106 

Review-Url: https://codereview.chromium.org/2103073003
Cr-Commit-Position: refs/heads/master@{#402643}

[modify] https://crrev.com/f61958a3d0125bc8848164c5dc6157e2c08738ae/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

Your change meets the bar and is auto-approved for M52 (branch: 2743)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/47aa3d93f873a0cb700a7452690d3f273dc19791

commit 47aa3d93f873a0cb700a7452690d3f273dc19791
Author: Jayson Adams <shrike@chromium.org>
Date: Thu Jun 30 01:03:12 2016

[Mac][Material Design] Use white tab spinner for dark themes.

In Material Design we display a white tab spinner for Incognito mode
tabs, but we need to also do so for dark themes.

R=avi@chromium.org
BUG= 624106 

Review-Url: https://codereview.chromium.org/2103073003
Cr-Commit-Position: refs/heads/master@{#402643}
(cherry picked from commit f61958a3d0125bc8848164c5dc6157e2c08738ae)

Review URL: https://codereview.chromium.org/2104233004 .

Cr-Commit-Position: refs/branch-heads/2743@{#540}
Cr-Branched-From: 2b3ae3b8090361f8af5a611712fc1a5ab2de53cb-refs/heads/master@{#394939}

[modify] https://crrev.com/47aa3d93f873a0cb700a7452690d3f273dc19791/chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

Tested the above issue on Mac 10.11.5 with chrome version '52.0..2743.75' & white tab spinner is displayed for dark them for material design. Hence marking the same as TE-Verified-52.0..2743.75.

Thank you!