R=ahaas@chromium.org
TEST=message/asm-function-mismatch-def
BUG=v8:6208

Change-Id: I415281d63bb376da3220ba31bbdf0b3d60e03299
Reviewed-on: https://chromium-review.googlesource.com/469947
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44482}