Add missing #includes for referenced types.

These missing includes were discovered when attempting a refactor.

Change-Id: I8aad5610de2337de6e55885b5868e606c1514eaf
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/305997
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
7 files changed