Looking up 'name' and 'message' properties at the same time and loading
the properties later can cause assertion failure if one of the properties
is an accessor and calling it changes the holder map. That may invalidate
the other lookup.

R=jkummerow@chromium.org
BUG=chromium:542101
LOG=N

Review URL: https://codereview.chromium.org/1403923002

Cr-Commit-Position: refs/heads/master@{#31229}