Moving URL bar fires visualViewport resize event

This CL makes it so that hiding or showing the URL bar continually fires
visualViewport resize events. Previously, the resize event would be
fired only once the user lifts their finger.

Bug: 762518
Change-Id: I09470b980d09b16d5cd7b60e98e7ec3653fdaa40
Reviewed-on: https://chromium-review.googlesource.com/666600
Commit-Queue: David Bokan <bokan@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504230}
3 files changed