Fix Clang warnings. MSVC's more permissing validator missed a dependent typename, and deleting a void pointer. BUG=angle:703,704 Change-Id: I227b94c9c1590973d7b11b0ed0bfda32f2a71cec Reviewed-on: https://chromium-review.googlesource.com/209613 Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>