namespace {} trick for SK_DECLARE_STATIC_ONCE

include/core/SkOnce.h

Index: include/core/SkOnce.h
diff --git a/include/core/SkOnce.h b/include/core/SkOnce.h
index 87bb277800e7d1ba89d808781be7231a12dd4dd3..f025cc2abf8db5d282ac02e6d80f3a015faedc81 100644
--- a/include/core/SkOnce.h
+++ b/include/core/SkOnce.h
@@ -31,8 +31,8 @@
 #include "SkThread.h"
 #include "SkTypes.h"
 
-// This must be used in a global or function scope, not as a class member.
-#define SK_DECLARE_STATIC_ONCE(name) static SkOnceFlag name
+// This must be used in a global scope, not in fuction scope or as a class member.
+#define SK_DECLARE_STATIC_ONCE(name) namespace {} static SkOnceFlag name
 
 class SkOnceFlag;