Remove manual include path setup for gtest and gmock This should no longer needed after http://crrev.com/d805a40eb7b1ef6b BUG=chromium:630299 Change-Id: I2f78a922d873cf1b5809b3454cb0b72267261b97 Reviewed-on: https://chromium-review.googlesource.com/362295 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>