Repro steps:
1) Load MD Settings
2) Initiate a search (for example 'foo')
3) Initiate a 2nd search after you see the spinner.

I think https://codereview.chromium.org/2188063003 is fixing the issue. My understanding is that after CL 2180843006, every element implementing the CrSearchFieldBehavior must override the getSearchInput() method. Unfortunately the compiler does not seem to detect cases where the @abstract method is not overriden.

Also it turns out the compiler does not like marking such methods with @override (see following error)

(ERROR) Error in: settings_subpage_search.js
## /usr/local/google/home/dpapad/workspace/chromium1/src/chrome/browser/resources/settings/settings_page/settings_subpage_search.js:18: ERROR - property getSearchInput not defined on any superclass of SettingsSubpageSearchElement
##   getSearchInput: function() {
##                   ^

It seems that the compiler's PolymerPass does not understand @abstract inside behaviors and @override inside a behavior's implementor.

To clarify a bit, this error can be reproduced without searching. It actually happens when the "manage passwords" subpage is rendered. It just happens that searching force-renders the "manage passwords" subpage, and also triggers the error.

Alternative repro steps
1) Navigate to chrome://md-settings/managePasswords
2) Observe error in the console.

Fix is in the CQ, https://codereview.chromium.org/2188063003.

Argh, I didn't realise this one existed. It's frustrating that Closure didn't help us find this before the change landed.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/36579b0bc9520e57ed45539d3f82d668d9c2dc2b

commit 36579b0bc9520e57ed45539d3f82d668d9c2dc2b
Author: dpapad <dpapad@chromium.org>
Date: Thu Jul 28 23:55:32 2016

MD Settings: Fix runtime error when visiting "manage passwords" page.

BUG= 632432 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2188063003
Cr-Commit-Position: refs/heads/master@{#408513}

[modify] https://crrev.com/36579b0bc9520e57ed45539d3f82d668d9c2dc2b/chrome/browser/resources/settings/settings_page/settings_subpage_search.js