Fix clang 3.2 warnings.

Fix clang 3.2 warnings.

Majority of these were false positives, but the fixes were simple.
Took the simplest route with gtest and edited the source.  We just need
to fix this thing again if/when we update to a newer version if it isn't
fixed upstream.

Change-Id: I5007d26ac9f38c61d5f0258d5bd4ccb7c08f4336