You are probably looking for a change made after 573749 (known good), but no later than 573757 (first known bad).

Narrow Bisect info : 
https://chromium.googlesource.com/chromium/src/+log/c7edc3debe8cfd6252336e7e8c2cc9a705d1ce53..6fcde312b4eebcbf61d171a855c36fa06d1a9fa7?pretty=fuller&n=50

Suspecting: r573752 from Narrow bisect

@pbos: Could you please help to reassign if your change is not the cause for this change.

Note:
1.Unable to provide bisect using per-revision script,Hence providing chromium bisect.
2.Issue is not seen on Mac(10.12.6,10.13.1,10.13.6)& Linux (14.04 LTS)OS

Load balancing.

This is pretty bad for these languages, bumping prio as I don't think we should ship this bug. LMK if you disagree.

Load balancing

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fc6a591e5c36e920725061d60f71bc5e3005d0fe

commit fc6a591e5c36e920725061d60f71bc5e3005d0fe
Author: Peter Boström <pbos@chromium.org>
Date: Thu Jul 26 18:53:04 2018

Fixate toolbar button font height

This fixes an issue where Hindi increases ToolbarButton's height
resulting in oblong InkDrop shapes. It also increases the font size for
touchable Chrome which matches the larger shape of the toolbar better.

Bug:  chromium:862514 
Change-Id: I66cd2d7e06a27e6c03402e28679b55eaaaeaccf8
Reviewed-on: https://chromium-review.googlesource.com/1150960
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578385}
[modify] https://crrev.com/fc6a591e5c36e920725061d60f71bc5e3005d0fe/chrome/browser/ui/views/harmony/chrome_typography.cc
[modify] https://crrev.com/fc6a591e5c36e920725061d60f71bc5e3005d0fe/chrome/browser/ui/views/harmony/chrome_typography.h
[modify] https://crrev.com/fc6a591e5c36e920725061d60f71bc5e3005d0fe/chrome/browser/ui/views/harmony/harmony_typography_provider.cc
[modify] https://crrev.com/fc6a591e5c36e920725061d60f71bc5e3005d0fe/chrome/browser/ui/views/toolbar/toolbar_button.cc

Update :
Rechecked the above issue on Windows(7,8,8.1,10)OS with latest Canary Chrome version : 70.0.3504.0 and the issue is Fixed.Hence adding TE Verified Label.

Kindly refer the attached screen cast for reference.

Deleted: Fixed_video.mp4 294 KB

	Fixed_video.mp4 294 KB View Download

Thanks!

Requesting merge to M69, this is a pretty significant visual regression for a large population (Hindi, languages with other taller fonts).

There is probably a regression:  Issue 868442 

Removing merge-request until we've fixed the fix. Thanks mehmet@.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0cdb7dd4de9d13ce3b5f74e39d47f96bd2383a26

commit 0cdb7dd4de9d13ce3b5f74e39d47f96bd2383a26
Author: Peter Boström <pbos@chromium.org>
Date: Sun Jul 29 06:28:15 2018

Decrease available ToolbarButton height for font

The current 18dp fixed height results in pushing the total button height
on Mac. This doesn't happen by default on Windows as the default font
results in equal size_delta values for 18dp and 17dp available height.

This probably means that 17dp is the actual available height that
doesn't increase the toolbar-button height.

Bug:  chromium:862514 ,  chromium:868442 
Change-Id: I7c07eb987cb5e4f7a0f200dcbe77b2ac72a751f3
Reviewed-on: https://chromium-review.googlesource.com/1153574
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578947}
[modify] https://crrev.com/0cdb7dd4de9d13ce3b5f74e39d47f96bd2383a26/chrome/browser/ui/views/harmony/chrome_typography.cc

Update :
Rechecked the above issue on Windows(7,8,8.1,10) OS with latest Canary Chrome version : 70.0.3507.0 and the issue is Fixed.Hence adding TE Verified Label.

Kindly refer the attached screen cast for reference.

Deleted: Fixed_video.mp4 282 KB

	Fixed_video.mp4 282 KB View Download

Requesting merge, comment #13 still applies, we just need to apply both patches.

Approving merge to M69 branch 3497 based on comment #19. Please merge. Thank you.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/eac5a8875e9955625371f4a42b44aa3a43ba6699

commit eac5a8875e9955625371f4a42b44aa3a43ba6699
Author: Peter Boström <pbos@chromium.org>
Date: Mon Jul 30 23:23:37 2018

Fixate toolbar button font height

This fixes an issue where Hindi increases ToolbarButton's height
resulting in oblong InkDrop shapes. It also increases the font size for
touchable Chrome which matches the larger shape of the toolbar better.

Bug:  chromium:862514 
Change-Id: I66cd2d7e06a27e6c03402e28679b55eaaaeaccf8
Reviewed-on: https://chromium-review.googlesource.com/1150960
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#578385}(cherry picked from commit fc6a591e5c36e920725061d60f71bc5e3005d0fe)
Reviewed-on: https://chromium-review.googlesource.com/1155499
Reviewed-by: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/branch-heads/3497@{#253}
Cr-Branched-From: 271eaf50594eb818c9295dc78d364aea18c82ea8-refs/heads/master@{#576753}
[modify] https://crrev.com/eac5a8875e9955625371f4a42b44aa3a43ba6699/chrome/browser/ui/views/harmony/chrome_typography.cc
[modify] https://crrev.com/eac5a8875e9955625371f4a42b44aa3a43ba6699/chrome/browser/ui/views/harmony/chrome_typography.h
[modify] https://crrev.com/eac5a8875e9955625371f4a42b44aa3a43ba6699/chrome/browser/ui/views/harmony/harmony_typography_provider.cc
[modify] https://crrev.com/eac5a8875e9955625371f4a42b44aa3a43ba6699/chrome/browser/ui/views/toolbar/toolbar_button.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e4961c5b9c0c61e3ffbc65c6ef87d897ea0f28c5

commit e4961c5b9c0c61e3ffbc65c6ef87d897ea0f28c5
Author: Peter Boström <pbos@chromium.org>
Date: Mon Jul 30 23:24:01 2018

Decrease available ToolbarButton height for font

The current 18dp fixed height results in pushing the total button height
on Mac. This doesn't happen by default on Windows as the default font
results in equal size_delta values for 18dp and 17dp available height.

This probably means that 17dp is the actual available height that
doesn't increase the toolbar-button height.

Bug:  chromium:862514 ,  chromium:868442 
Change-Id: I7c07eb987cb5e4f7a0f200dcbe77b2ac72a751f3
Reviewed-on: https://chromium-review.googlesource.com/1153574
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Boström <pbos@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#578947}(cherry picked from commit 0cdb7dd4de9d13ce3b5f74e39d47f96bd2383a26)
Reviewed-on: https://chromium-review.googlesource.com/1155617
Reviewed-by: Peter Boström <pbos@chromium.org>
Cr-Commit-Position: refs/branch-heads/3497@{#254}
Cr-Branched-From: 271eaf50594eb818c9295dc78d364aea18c82ea8-refs/heads/master@{#576753}
[modify] https://crrev.com/e4961c5b9c0c61e3ffbc65c6ef87d897ea0f28c5/chrome/browser/ui/views/harmony/chrome_typography.cc

Update :
Rechecked the above issue on Windows(7,8,8.1,10) OS using Dev build version : 69.0.3497.23 and the issue is Fixed.Hence adding TE Verified Label.

Kindly refer the attached screen cast for reference.

Deleted: Fixed_video.mp4 448 KB

	Fixed_video.mp4 448 KB View Download

+abdulsyed@ fyi, M69 merges taken for Proj-MdRefresh .