Drop unneeded .get() in GrCoverageCountingPathRenderer.cpp

MSVC's std::unique_ptr<>::get() is marked as NODISCARD, and the .get()
call here causes a warning.

Bug: chromium:752720
Change-Id: Iadc217247533b6148285f7a81c982527d98c86f9
Reviewed-on: https://skia-review.googlesource.com/130360
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed