MD Settings: actually fix sync Learn More click issues

chrome/test/data/webui/settings/people_page_sync_page_test.js

Index: chrome/test/data/webui/settings/people_page_sync_page_test.js
diff --git a/chrome/test/data/webui/settings/people_page_sync_page_test.js b/chrome/test/data/webui/settings/people_page_sync_page_test.js
index 312c5e3f69c2efc44e4f295fad0381d3cd828bbb..79927fd29658f6db83cac3b052518a07e29138cc 100644
--- a/chrome/test/data/webui/settings/people_page_sync_page_test.js
+++ b/chrome/test/data/webui/settings/people_page_sync_page_test.js
@@ -287,6 +287,24 @@ cr.define('settings_people_page_sync_page', function() {
         assertTrue(encryptWithPassphrase.checked);
       });
 
+      test('ClickingLinkDoesNotChangeRadioValue', function() {
+        assertFalse(encryptWithPassphrase.disabled);
+        assertFalse(encryptWithPassphrase.checked);
+
+        // Make sure the checkbox is enabled and checked.

[tommycli, 2016/12/15 16:08:33]

nit: it's actually a radio box

[Dan Beam, 2016/12/16 01:24:40]

Done.

+        var link = encryptWithPassphrase.querySelector('a[href]');
+        assertTrue(!!link);
+
+        // Suppress opening a new tab, since then the test will continue running
+        // on a background tab (which has throttled timers) and will timeout.
+        link.target = '';
+        link.href = '#';
+
+        MockInteractions.tap(link);
+
+        assertFalse(encryptWithPassphrase.checked);
+      });
+
       test('SaveButtonDisabledWhenPassphraseOrConfirmationEmpty', function() {
         MockInteractions.tap(encryptWithPassphrase);
         Polymer.dom.flush();