The two tests in question got a lot slower and started to timeout now
that the C++ fallback implementation of the %Arguments intrinsics is
composable with respect to inlining.

R=bmeurer@chromium.org,machenbach@chromium.org

Review URL: https://codereview.chromium.org/1330203003

Cr-Commit-Position: refs/heads/master@{#30674}