++ Correction: 
Expected: Back navigation should not be enabled by default.

Issue is seen for every NTP, new window,New incognito window and guest mode.

Manual Bisect Info:
===================
Good build:57.0.2976.0
Bad build:57.0.2977.0

Issue is seen in windows too.

Able to reproduce this issue on Windows-10 and Ubuntu 14..04 using chrome latest Dev M57-57.0.2977.0. This issue is not observed on Mac OS 10.12.

Using the per-revision bisect providing the bisect results,

You are probably looking for a change made after 442356 (known good), but no later than 442357 (first known bad).

CHANGE-LOG URL:
---------------------------------------
https://chromium.googlesource.com/chromium/src/+log/6fc67b4140d07a660d3b2b6d2eae7a4fd8b6c9dd..01876af8d286f290fc12baeae8e4ac08913b9b90

From the CL above, assigning the issue to the concern owner
Review-Url: https://codereview.chromium.org/2618403002

estade@ - 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.

Thanks!

 Issue 679711  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e233068cdf299e2b78357576c68caa21866d7844

commit e233068cdf299e2b78357576c68caa21866d7844
Author: estade <estade@chromium.org>
Date: Wed Jan 11 04:39:42 2017

Fix typo from crrev.com/01876af8d286f290fc12baeae8e4ac08913b9b90

BUG= 679660 

Review-Url: https://codereview.chromium.org/2624973002
Cr-Commit-Position: refs/heads/master@{#442802}

[modify] https://crrev.com/e233068cdf299e2b78357576c68caa21866d7844/chrome/browser/ui/views/toolbar/toolbar_view.cc

Tested the issue on Windows-10, Ubuntu 14.04 using chrome latest M57-57.0.2979.0 by following steps mentioned in the original comment. Observed that Back navigation is not displaying as expected. Hence adding TE-Verified label.
Please find the screen shot for reference.

Thank you!

Deleted: 679660.png 111 KB

	679660.png 111 KB View Download