I've downgrade my browser to chrome beta(and found the problem gone), so the User agent is not same as the time I found the problem.
When in dev channel, I've tested open twitter.com in incognito mode(and disabled all extensions in this mode), the problem is still there, so seems the bug is in browser itself.

Can you please post a screenshot of the bug? Thanks.

It's possible that the font color is incorrect. Are you able to replicate it on incognito or normal?

Can't reproduce on Chrome 54.0.2837.0. See attached screenshot. Can you post a screenshot?

Deleted: Screen Shot 2016-08-25 at 11.32.15 AM.png 12.6 KB

	Screen Shot 2016-08-25 at 11.32.15 AM.png 12.6 KB View Download

Also, can you reproduce this on Chrome stable?

screenshot: https://i.imgur.com/Lo48Mj5.png
Found the reproduce method: 
1, chrome 54.0.2837 + (currently dev/canary)
2，install this theme: https://chrome.google.com/webstore/detail/aero-trans-brushed-metal/jkjdfchjlhkgnfjblhclgaliiccalckf?hl=zh-CN
3, open any EV SSL site like twitter or github, the EV sign is all blank, either normal or incognito.

Cannot reproduce in stable and beta, with same theme. 

Verified the instructions in comment 6 and 7. Since this is not reproducible in beta, marking it as a regression. 

This is how things are supposed to look.  We changed the appearance, we have not (yet) changed any functionality.

Wait a minute, I looked at the screenshot on comment 4, not comment 6.

I don't know why the EV text color would change with a theme installation.  It doesn't on views.

I'm pretty sure the reason why this is happening is because the EV cert thinks the dark theme = incognito. This should be a quick fix

Able to reproduce the issue and issue is a regression broken in M54 only for MAC OS. Below are bisect Details for the same:

Bisect info:
============
54.0.2829.0 - Good Build
54.0.2830.0 - Bad Build

Bisect URL: 
===========
https://chromium.googlesource.com/chromium/src/+log/2e2c2dd91f4e3f52aab75454aa34b2b6df5ba1e6..6546cb056dbfca5975de3fd7dd29015b025f0cf6

Suspecting change #411994, could be the possible culprit.@ spqchan: Assigning to you, request you to please take a look into it. Please help us to reassign if not with respect to your change.

Change URL: https://chromium.googlesource.com/chromium/src/+/f54c0238952086f5cf5c3dce0f5bdbf88a6d4d72
Review-Url: https://codereview.chromium.org/2241943002

Thanks.!

 Issue 640785  has been merged into this issue.

 Issue 641557  has been merged into this issue.

Fix in review:

Fix in review: https://codereview.chromium.org/2265423007/

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9fdc7e10d5e08818fd54a1e7a1d868b0ff8b20dd

commit 9fdc7e10d5e08818fd54a1e7a1d868b0ff8b20dd
Author: spqchan <spqchan@chromium.org>
Date: Tue Aug 30 03:52:38 2016

[Material][Mac] Fix for bubble decoration text in dark theme

BUG= 640511 

Review-Url: https://codereview.chromium.org/2265423007
Cr-Commit-Position: refs/heads/master@{#415062}

[modify] https://crrev.com/9fdc7e10d5e08818fd54a1e7a1d868b0ff8b20dd/chrome/browser/ui/cocoa/location_bar/bubble_decoration.mm
[modify] https://crrev.com/9fdc7e10d5e08818fd54a1e7a1d868b0ff8b20dd/chrome/browser/ui/cocoa/tabs/tab_window_controller.mm

Your change meets the bar and is auto-approved for M54 (branch: 2840)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6a5fed01d5c079bc81e640026b7320b602a8c587

commit 6a5fed01d5c079bc81e640026b7320b602a8c587
Author: spqchan <spqchan@chromium.org>
Date: Wed Aug 31 21:56:49 2016

[Material][Mac] Fix for bubble decoration text in dark theme

BUG= 640511 

Review-Url: https://codereview.chromium.org/2265423007
Cr-Commit-Position: refs/heads/master@{#415062}
(cherry picked from commit 9fdc7e10d5e08818fd54a1e7a1d868b0ff8b20dd)

Review URL: https://codereview.chromium.org/2302603002 .

Cr-Commit-Position: refs/branch-heads/2840@{#83}
Cr-Branched-From: 1ae106dbab4bddd85132d5b75c670794311f4c57-refs/heads/master@{#414607}

[modify] https://crrev.com/6a5fed01d5c079bc81e640026b7320b602a8c587/chrome/browser/ui/cocoa/location_bar/bubble_decoration.mm
[modify] https://crrev.com/6a5fed01d5c079bc81e640026b7320b602a8c587/chrome/browser/ui/cocoa/tabs/tab_window_controller.mm

Rechecked this on chrome version 54.0.2840.8 on MAC 10.11.6. Fix is working as intended. Followed the below steps:

Installed chrome and Installed the theme "https://chrome.google.com/webstore/detail/aero-trans-brushed-metal/jkjdfchjlhkgnfjblhclgaliiccalckf?hl=zh-CN"

2) Navigated to chrome flags and enabled  #safe-search-url-reporting
3) Navigated to twitter.com 

EV SSL sign is displayed. Attached screenshot for the same. Adding TE-Verified labels.

Deleted: EV SSL.png 66.6 KB

	EV SSL.png 66.6 KB View Download

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6a5fed01d5c079bc81e640026b7320b602a8c587

commit 6a5fed01d5c079bc81e640026b7320b602a8c587
Author: spqchan <spqchan@chromium.org>
Date: Wed Aug 31 21:56:49 2016

[Material][Mac] Fix for bubble decoration text in dark theme

BUG= 640511 

Review-Url: https://codereview.chromium.org/2265423007
Cr-Commit-Position: refs/heads/master@{#415062}
(cherry picked from commit 9fdc7e10d5e08818fd54a1e7a1d868b0ff8b20dd)

Review URL: https://codereview.chromium.org/2302603002 .

Cr-Commit-Position: refs/branch-heads/2840@{#83}
Cr-Branched-From: 1ae106dbab4bddd85132d5b75c670794311f4c57-refs/heads/master@{#414607}

[modify] https://crrev.com/6a5fed01d5c079bc81e640026b7320b602a8c587/chrome/browser/ui/cocoa/location_bar/bubble_decoration.mm
[modify] https://crrev.com/6a5fed01d5c079bc81e640026b7320b602a8c587/chrome/browser/ui/cocoa/tabs/tab_window_controller.mm