Require SK_DECLARE_STATIC_LAZY_PTR is used in global scope.

src/core/SkPathRef.cpp

Index: src/core/SkPathRef.cpp
diff --git a/src/core/SkPathRef.cpp b/src/core/SkPathRef.cpp
index 57076939b67927c431faa02de36d1a5a3255f8cd..dffb6a3646aefd27727ff357d63f855e4e4247b0 100644
--- a/src/core/SkPathRef.cpp
+++ b/src/core/SkPathRef.cpp
@@ -29,14 +29,16 @@ SkPathRef::Editor::Editor(SkAutoTUnref<SkPathRef>* pathRef,
 
 //////////////////////////////////////////////////////////////////////////////
 
-SkPathRef* SkPathRef::CreateEmptyImpl() {
+// As a template argument, this must have external linkage.
+SkPathRef* sk_create_empty_pathref() {
     SkPathRef* empty = SkNEW(SkPathRef);
     empty->computeBounds();   // Avoids races later to be the first to do this.
     return empty;
 }
 
+SK_DECLARE_STATIC_LAZY_PTR(SkPathRef, empty, sk_create_empty_pathref);
+
 SkPathRef* SkPathRef::CreateEmpty() {
-    SK_DECLARE_STATIC_LAZY_PTR(SkPathRef, empty, CreateEmptyImpl);
     return SkRef(empty.get());
 }