- Support ObjC / ObjC++
- Build SDL on Mac.
- Build viewer on Mac.
Patched from Jim's CL.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3760
Change-Id: I12663f2ed2969e22f51aefed560fbc22b2524167
Reviewed-on: https://skia-review.googlesource.com/3760
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
