Meta-issue for something that was discussed in today's TC meeting: test coverage for C++ code that is only tested indirectly now.

Strawman proposal: bundle gtest, make it part of make test and start churning out src/*_unittest.cc tests like chromium has.

Problem: most of the code in src/ is not very modular right now. Turning it into something that is easily testable will no doubt create a lot of churn. Probably unavoidable but it's acceptable to me.

/cc @indutny @piscisaureus @trevnorris - if we can get some consensus on this, I volunteer to do the initial work.