Scott, do you know if there's something we can do deterministically to force this UI change to (try to) occur?

It would be good to get a bisect for any regression here.

I see this working correctly on Linux (version 50.0.2661.94 (64-bit)).

To test, pin any tab, then cause something to change the title while the tab is foreground (I ran this in the console "window.setTimeout(function() { document.title = 'zzz'; }, 1000);" and switched tab before it ran. It did cause the tab to glow until the tab was focused.

Reporter, can you try the steps in comment 4 and see if you see a glow?

If not, are you using a custom theme?

Tested it multiple times, on multiple tabs. The tab does not glow.
Also tested with multiple sites with changing title, does not glow.

Using default theme.

I also don't see the glow animation on Windows Dev.

Odd that this would differ between Linux and Windows.  They basically use the same tabstrip code.

If anyone broke this, it's likely me.

Able to reproduce the issue on windows 7 using chrome version stable 50.0.2661.102 and canary 52.0.2734.0 with the below steps

1. Pin the tab
2.Executed the command "window.setTimeout(function() { document.title = 'zzz'; }, 1000);" in console
3.Switch to another tab 
4.Observed the there is no glow in pinned tab when theme is windows default theme.Able to see the glow when using dark theme.

This is regression issue broken in M50.Please find the bisect information as below
Good :50.0.2658.0  --   (official build 377177)
Bad:: 50.0.2659.0  --   (official build 377466)

CHANGELOG URL:  https://chromium.googlesource.com/chromium/src/+log/b515424de0aa3d62c4d64f4a73cf0bff137539c8..1f84a577db6da22b4e0e401f357a6299d4fa67a1

Possible suspect::
https://codereview.chromium.org/1711233002

Note:: This issue is working fine on Linux Ubuntu 14.04 and Mac 10.11.4.

Thnaks,

473898 changed the effect from a glow to a static image, so this isn't relevant anymore.

Do we actually get the image?

I certainly see it on tip of tree with my pinned gmail tab.

Can you check the steps in comment 8?  Hopefully this is fixed but I want to be careful.

Yes, 8 works. The problem with the js in #8 is that you have to switch tabs before 1 second, otherwise we won't show the badge (the badge is only shown if the title changes *and* the tab is not active). It's easier to see the behavior with something like:

window.setInterval(function() { document.title = document.title + 'z'; }, 1000);

This way the title continuously changes every second.

And for the record I am trying this on windows too.

Any further progress on fixing this issue?

vike91@gmail.com, this bug was closed as wontfix as the glow animation has been nuked in favor of a badge. See 473898 for details.