Don't use LOG() from platform.

Don't use LOG() from platform.

All places that use OS::Allocate either CHECK() that the result is non-NULL,
or use a reasonable fallback if they can't mmap memory.

BUG=none
R=mstarzinger@chromium.org
LOG=n

Committed: https://code.google.com/p/v8/source/detail?r=21810

[Michael Starzinger, 2014-06-11 08:10:38]

LGTM.

[jochen (gone - plz use gerrit), 2014-06-12 14:11:36]

Committed patchset #1 manually as r21810.