Due to the many merges and changes to 37c3979e the default framebuffer deletion "disappeared". Add it back to the destructor of Surface. Update Surface_unittests and remove one of the two tests as they were equivalent. BUG=524495 BUG=angleproject:1137 Change-Id: I1309285ea00976ae2685628ea3f92731a9259718 Reviewed-on: https://chromium-review.googlesource.com/295153Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Corentin Wallez <cwallez@chromium.org>
