Remove union from SkFontStyle.

This is prompted by a bug in vc++ reported at
https://developercommunity.visualstudio.com/content/problem/86829/constexpr-initializing-struct-in-union-only-zero-i.html

Visual C++ will not properly constexpr initialize a struct inside a
union. Removing this construct also allows us to avoid writing and
reading from different members of a union.

Change-Id: I76e069ecce77ef21b7ad3821bf9c29e1b0843618
Reviewed-on: https://skia-review.googlesource.com/28300
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
2 files changed