1.) Enable plznavigate on Android device
2.) Run UrlOverridingTest#testNavigationFromUserGesture

Expected:
The test passes and we get a signal about the navigation cancelled (i.e. errorcode is non-zero).

Actual:
The test fails due to lack of signal that the navigation is cancelled.

The only finish navigation call received has no error indication of the cancelation.  This differs a subframe was cancelled (i.e. running testNavigationFromUserGestureInSubFrame passed after adding plznavigate calls in the test).

onDidFinishNavigation :
  mainFrame: true
  url: intent://test/#Intent;scheme=test;package=com.chrome.test;end
  error code: 0
  error page: false
  committed: false
  page transition: null