move SkPathRef.h into private

Bug: skia:
Change-Id: I3370c594301ae833ec1fe3cb16ac544e5b2128e8
Reviewed-on: https://skia-review.googlesource.com/18982
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/tests/RRectInPathTest.cpp b/tests/RRectInPathTest.cpp
index 5b7d17d..4aa535e 100644
--- a/tests/RRectInPathTest.cpp
+++ b/tests/RRectInPathTest.cpp
@@ -7,7 +7,7 @@
 
 #include "SkMatrix.h"
 #include "SkPath.h"
-#include "SkPathRef.h"
+//#include "SkPathRef.h"
 #include "SkRRect.h"
 #include "Test.h"