Add instrumentation into SkArenaAlloc.

Add a parameter to the constructor that will have the dtor print out
stats for setting the initial parameters.

Clean up: Move some function so they are in the same order as .h

Change-Id: I19d87dcc9c3b8dcc3e1d4f2ff078b78bbc490d92
Reviewed-on: https://skia-review.googlesource.com/14600
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Herb Derby <herb@google.com>
2 files changed