Fix direct load from APK on Samsung devices

This patch re-enables loading from APK on Samsung devices where the mmap
exec check is skipped (due to
https://code.google.com/p/chromium/issues/detail?id=448084).

BUG=489267

Review URL: https://codereview.chromium.org/1129223007

Cr-Commit-Position: refs/heads/master@{#330371}
1 file changed