GitLab

The logging macros should be usable by anything that depends on
mojo/public/cpp/environment (i.e., everything except
mojo/public/cpp/{system,utility}).

The macros are a simplified version of the usual ones in base/logging.h,
omitting (D)CHECK_{EQ,NE,GT,...}. Also currently not present are
(D)VLOG, etc.

I'm considering also adding MOJO_(D)CHECK_OK(mojo_result) and
MOJO_(D)LOG_IF_NOT_OK(level, mojo_result), which might be used similarly
to (D)PCHECK and (D)PLOG (for errno/GetLastError()). But I'd do that
separately.

R=darin@chromium.org

Review URL: https://codereview.chromium.org/342653004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278504 0039d316-1c4b-4281-b951-d872f2087c98