tree 5a148ee0299655951f7fd4774fc27075a15f9d49
parent 9732d4b63aabf50a2df1bd82c7bea3dce4e3f8d0
author Dan Albert <danalbert@google.com> 1456873312 -0800
committer Dan Albert <danalbert@google.com> 1461863199 -0700

Add external/googletest.

This is being added to replace external/gtest and external/gmock, but
I'm not removing those in this commit to try to minimize transient
build breakages.