This reverts commit 368641eb4f.
Reason for revert: This introduced a bug which causes horizontal
scrolling on pages with a vertical scroll bar, due to 100vw hot taking
into account the width of the scroll bar. This is not an easy fix, so
reverting this change, at least for now.
Change-Id: Iff02ec60e02c85593dafdb3f9c5f99cf6cfac2ab