Use O_BINARY in base/file for Windows.

This matches the behavior of the google3/Chrome APIs. It's probably what you
want in all cases except where you plan on calling Split(content, "\n"), but
we should probably have something like simpleperf's LineReader for that
anyway.

Change-Id: I1a128ed8c328bc95b0b2ef4068a65a8562721418
1 file changed