marking as RBB, please change if required

fairly sure https://crrev.com/c/1405724 will fix (which should be included in tomorrow's canary)

Update :
Retested the above issue and it is still reproducible on Linux(14.04 LTS) in Latest Canary #73.0.3672.0.
Kindly refer the attached screen-shot.
Thank You..

Deleted: canarybehaviour.png 136 KB

	canarybehaviour.png 136 KB View Download

hey shrutij@, can you do the bisect again?

Update :
WRT to comment#5:

You are probably looking for a change made after 621390 (known good), but no later than 621391 (first known bad).

CHANGE-LOG URL:

The script might not always return single CL as suspect as some perf builds might get missing due to failure.

https://chromium.googlesource.com/chromium/src/+log/64f9fa5153f9e73ca45193e54a01fa077e59131f..c301f0abb8821646d3acea02aa73425360157d86

Suspect: https://chromium.googlesource.com/chromium/src/+/c301f0abb8821646d3acea02aa73425360157d86

lgrey: Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Note:
1.Re-bisected the issue three times got lgrey as suspect.
2.Re-bisected and got different suspect, sorry @dbeam for assigning you.

Thank You! 

Just to update:

This issue reproduce only on Ubuntu 14.04. Working fine in Ubuntu 16.04,Fedora 24& 25, Debian and Opensuse.

Thank You!

 Issue 922874  has been merged into this issue.

r621391 seems quite possible

Friendly ping!
Could you please provide any update on this issue as it has been marked as RBB and beta release is coming soon.

Thank You!

I'll look at it today

thomasanderson@ is there a way I can set up options to repro this on a gLinux install? I'm assuming I need to trigger the GTK theme somehow?

Yeah, you can enable the gtk theme in chrome://settings > Themes > Use GTK+

Thanks!

Looks like this is what's getting returned from
GetBgColor(GtkButton#button.text-button.default.suggested-action");

Is there another constant you'd recommend using?

Hm.. so it appears not all GTK themes actually style buttons with the "default" or "suggested-action" classes.  I'd recommend reverting the changes in native_theme_gtk.cc from c301f0abb8821646d3acea02aa73425360157d86

The ButtonBorderColor can stay the same. ProminentButtonDisabledColor could probably be GetBgColor("GtkButton#button.text-button:disabled")

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/71939a0b814a0e98d7a225c7b75b9b92ff2b89c1

commit 71939a0b814a0e98d7a225c7b75b9b92ff2b89c1
Author: Leonard Grey <lgrey@chromium.org>
Date: Tue Jan 22 21:42:29 2019

GTK theme: fix button colors

Bug: 920975
Change-Id: I93c442be6d76958db60d6840d21ca49192e1ae84
Reviewed-on: https://chromium-review.googlesource.com/c/1427443
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Commit-Queue: Leonard Grey <lgrey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#624934}
[modify] https://crrev.com/71939a0b814a0e98d7a225c7b75b9b92ff2b89c1/chrome/browser/ui/libgtkui/native_theme_gtk.cc