If a texture is bound to a framebuffer before any data is set on it, the texture does not have a type because it has never been bound. This generates an INVALID_OPERATION because the attachment type cannot be validated. Fixes: * Many generated GL_INVALID_OPERATIONs in chromium BUG=angleproject:884 Change-Id: I4f36f80fecc5a772b6522f8f82e0be9d3758e524 Reviewed-on: https://chromium-review.googlesource.com/273324Tested-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Brandon Jones <bajones@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org>
