By giving higher priority to processing non-effect-chain nodes, this
changes the scheduling inside of basic blocks to place nodes before the
latest possible effect chain node.

Change-Id: I8b130904a1bb2360b995eb9de4f471a911a4e388
Reviewed-on: https://chromium-review.googlesource.com/c/1337743
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57656}