SkLazyPtr suitable as a local or class member.

tests/OnceTest.cpp

Index: tests/OnceTest.cpp
diff --git a/tests/OnceTest.cpp b/tests/OnceTest.cpp
index 192abaaee36266c81ceb3e7773b8ae524415a669..e2711f00bb2b3d58d0e670c4461fbbc0430e7855 100644
--- a/tests/OnceTest.cpp
+++ b/tests/OnceTest.cpp
@@ -31,6 +31,8 @@ static void add_six(int* x) {
     *x += 6;
 }
 
+namespace {
+
 class Racer : public SkRunnable {
 public:
     SkOnceFlag* once;
@@ -41,6 +43,8 @@ public:
     }
 };
 
+}  // namespace
+
 DEF_TEST(SkOnce_Multithreaded, r) {
     const int kTasks = 16;