Attaching screen-cast for reference.

Deleted: Actual_Learnmore link in sync.ogv 513 KB

	Actual_Learnmore link in sync.ogv 513 KB View Download

able to reproduce the issue on mac 10.11.5 using chrome version 53.0.2774.2

Moving this nonessential bug to the next milestone.

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

This is caused by the <a> link being inside a disabled <paper-checkbox>, and inheriting its css rule to ignore mouse events. 
dpapad and I experimented with some solutions:

1) we can specify a css rule to fix just on this page, for this specific link. This will allow us to fix the problem on our side very quickly for now. In our codebase we only have this one instance of link inside button-label.

2) If we think links inside checkboxes/radio-buttons might become more common, we could make a case with the Polymer authors that links should work inside disabled button-labels and make a PR to change it from source.

I'll be making a CL to execute 1), and we can optionally do 2) on an independent timeline.

Github issue for paper-checkbox created and can be tracked here: https://github.com/PolymerElements/paper-checkbox/issues/166

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d93ce395d082047e5b0d5d4ef038eeb3106beb22

commit d93ce395d082047e5b0d5d4ef038eeb3106beb22
Author: scottchen <scottchen@chromium.org>
Date: Fri Dec 09 18:48:01 2016

MD Settings: Make links inside disabled checkbox clickable on syncSetup page

BUG= 621903 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2563443005
Cr-Commit-Position: refs/heads/master@{#437597}

[modify] https://crrev.com/d93ce395d082047e5b0d5d4ef038eeb3106beb22/chrome/browser/resources/settings/people_page/sync_page.html

Verified on ChromeOS 9086.0.0, 57.0.2951.0