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JS_SCROLL_TEXT_ONLY and JS_SCROLL_200_LAYER_GRID both add event listeners
to the document that preventDefault wheel/touch events and call JS scrolling.
The tests regressed after landing the following cl:
https://chromium-review.googlesource.com/1183538

This is because with passive document level event listeners interventions
the wheel/mousewheel and touchstart/touchmove event listeners on a document
level target are treated as passive if not requested otherwise. This cl changes
the event listeners in both tests to passive:false to make sure that they
actually prevent scrolling.

Bug: 877586
Change-Id: I25fb5c0563534b1d67f124bd43272d02d849fa23
Reviewed-on: https://chromium-review.googlesource.com/c/1329447
Commit-Queue: Sahel Sharify <sahel@chromium.org>
Reviewed-by: Charlie Andrews <charliea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607441}