This adds handling of simplified ops without effect input to the escape
status analysis. Such uses are treated as escaping for now until we add
dedicated handling to the escape analysis reducer.

R=bmeurer@chromium.org
BUG=chromium:650170

Review-Url: https://codereview.chromium.org/2372533002
Cr-Commit-Position: refs/heads/master@{#39714}