Windowing and events:
* Use a NSTrackingArea to only capture mouse events within the view.
* Use ViewDelegate to track events rather than pulling them out of the
event pump.
* Sets up the autoreleasepool correctly to clear out old events
Context creation:
* Don't use a subview for OpenGL (it's not necessary).
* For Metal, use a CAMetalLayer rather than MTKView.
* Add vsync support to Metal.
Bug: skia:8737
Change-Id: I8ea5cc865df65f8dc2fef47082bf6a4d1657cf03
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/213672
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
d063e8b6f1