Using the per-revision bisect providing the bisect results,
Good build:58.0.2994.0 (Revision:446546).
Bad build:58.0.2995.0 (Revision:446864).

You are probably looking for a change made after 446843 (known good), but no later than 446844 (first known bad).

CHANGE-LOG URL:
---------------
https://chromium.googlesource.com/chromium/src/+log/50ae54449909cd460dfa06eb4bcef261363e8cb4..e9bb765477ee57a6bee2545dd3eae38b232f547e

From the CL above, assigning the issue to the concern owner

@dschuyler : Could you please look into the issue, pardon me if it has nothing to do with your changes and if possible please assign it to concern owner.

Review-Url: https://codereview.chromium.org/2659833002
Note : Windows specific issue and Able to reproduce in latest Canary #59.0.3053.3

CL at https://codereview.chromium.org/2818053002/

CL at https://codereview.chromium.org/2818053002/

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cdf55422a65db1c91c48ba50e952f9a1804bbb1a

commit cdf55422a65db1c91c48ba50e952f9a1804bbb1a
Author: dschuyler <dschuyler@chromium.org>
Date: Fri Apr 14 18:15:44 2017

[i18n] escape commas, polymer workaround

The Polymer binding parser treats commas and escaped commas as special.
This CL escapes commas so they are handled properly with Polymer.
(Without this CL the binding is ignored if an un-escaped comma is present).

BUG= 705850 

Review-Url: https://codereview.chromium.org/2818053002
Cr-Commit-Position: refs/heads/master@{#464753}

[modify] https://crrev.com/cdf55422a65db1c91c48ba50e952f9a1804bbb1a/ui/base/template_expressions.cc

This bug requires manual review: We don't branch M59 until 2017-04-13.
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), gkihumba@(ChromeOS), Abdul Syed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8b6a1ef9682320bdfc2bf9a604ec98b92d3f7ac0

commit 8b6a1ef9682320bdfc2bf9a604ec98b92d3f7ac0
Author: dschuyler <dschuyler@chromium.org>
Date: Fri Apr 14 21:07:54 2017

[i18n] unit test for commas in Polymer

This adds unit test for escaping commas in Polymer strings.
Related to https://codereview.chromium.org/2818053002/

BUG= 705850 

Review-Url: https://codereview.chromium.org/2814273005
Cr-Commit-Position: refs/heads/master@{#464794}

[modify] https://crrev.com/8b6a1ef9682320bdfc2bf9a604ec98b92d3f7ac0/ui/base/template_expressions_unittest.cc

Thanks - can you please confirm if this has been well tested in Canary, verified, and if there is enough unit test coverage for this change?

Tested the issue on Windows-10 & 7 using chrome latest Canary M60-60.0.3075.0 by following steps mentioned in the original comment. Observed that Automatic Downloads of summary is displaying as expected. Hence adding TE-Verified label.

Please find the screen shot for your reference.

Thank you!

Deleted: 705850.PNG 83.7 KB

	705850.PNG 83.7 KB View Download

After confirming that it's tested in canary, and unit tests are added in #8, approving merge for M59. 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0419a2b67cc65c1b1dd462c2eeeaf0a25de87341

commit 0419a2b67cc65c1b1dd462c2eeeaf0a25de87341
Author: Dave Schuyler <dschuyler@chromium.org>
Date: Thu Apr 20 18:38:58 2017

[i18n] escape commas, polymer workaround

The Polymer binding parser treats commas and escaped commas as special.
This CL escapes commas so they are handled properly with Polymer.
(Without this CL the binding is ignored if an un-escaped comma is present).

BUG= 705850 

Review-Url: https://codereview.chromium.org/2818053002
Cr-Commit-Position: refs/heads/master@{#464753}
(cherry picked from commit cdf55422a65db1c91c48ba50e952f9a1804bbb1a)

Review-Url: https://codereview.chromium.org/2834573004 .
Cr-Commit-Position: refs/branch-heads/3071@{#92}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}

[modify] https://crrev.com/0419a2b67cc65c1b1dd462c2eeeaf0a25de87341/ui/base/template_expressions.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d70d39e251a031a5a0daa70445d3f78ff704b355

commit d70d39e251a031a5a0daa70445d3f78ff704b355
Author: Dave Schuyler <dschuyler@chromium.org>
Date: Thu Apr 20 18:40:16 2017

[i18n] unit test for commas in Polymer

This adds unit test for escaping commas in Polymer strings.
Related to https://codereview.chromium.org/2818053002/

BUG= 705850 

Review-Url: https://codereview.chromium.org/2814273005
Cr-Commit-Position: refs/heads/master@{#464794}
(cherry picked from commit 8b6a1ef9682320bdfc2bf9a604ec98b92d3f7ac0)

Review-Url: https://codereview.chromium.org/2829833005 .
Cr-Commit-Position: refs/branch-heads/3071@{#93}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}

[modify] https://crrev.com/d70d39e251a031a5a0daa70445d3f78ff704b355/ui/base/template_expressions_unittest.cc

Rechecked the issue on Windows-10 Laptop using chrome version 59.0.3071.25 by following steps mentioned in the original comment. Observed that Automatic Downloads of summary is displaying as expected. Hence adding TE-Verified label.