Remove Redraw call from RenderWidgetScreenMetricsEmulator.

This redraw used to be

  if (params.needs_resize_ack)
    delegate_->Redraw();

Which was there to cause a paint (pre compositing) or a composite (post
compositing) in order to send an ack after a resize. We no longer need
to make this redraw happen to get the appropriate ACK as
664698a679a27ce4e converted us to ACKing to SynchronizeVisualProperties
(which replaced Resize) directly, and now ACKing is tied to surface
synchronization and local surface IDs.

R=avi@chromium.org

Change-Id: Id1c0e3e5534b41767ce36fb2298af56a639fa677
Bug: 912193
Reviewed-on: https://chromium-review.googlesource.com/c/1431213
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625398}
4 files changed