sprinkle more tracing in GM, tests, and ok, and add TRACE_FUNC

Change-Id: I562d438bd65e9fd900cfc6831f971b4af25c8ae6
Reviewed-on: https://skia-review.googlesource.com/26361
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
6 files changed