Lay groundwork for SkOpts.

include/core/SkGraphics.h

Index: include/core/SkGraphics.h
diff --git a/include/core/SkGraphics.h b/include/core/SkGraphics.h
index f2e3d8dac04479fb9f50965345621e78f998c079..8d804b37053257760e9de2c3d7a1c0853df8ac58 100644
--- a/include/core/SkGraphics.h
+++ b/include/core/SkGraphics.h
@@ -17,8 +17,8 @@ class SK_API SkGraphics {
 public:
     /**
      *  Call this at process initialization time if your environment does not
-     *  permit static global initializers that execute code. Note that
-     *  Init() is not thread-safe.
+     *  permit static global initializers that execute code.
+     *  Init() is thread-safe and idempotent.
      */
     static void Init();