Remove _impl from names in SkOnce.h.

This is entirely to make power users (me, Mike's per-object use case) feel less
bad about calling sk_once() directly with args not created by DEF_SK_ONCE.

BUG=
R=bungeman@google.com

Author: mtklein@google.com

Review URL: https://codereview.chromium.org/26129010

git-svn-id: http://skia.googlecode.com/svn/trunk/src@11686 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed