Port uses of SkLazyPtr to SkOncePtr.

src/core/SkPathRef.cpp

Index: src/core/SkPathRef.cpp
diff --git a/src/core/SkPathRef.cpp b/src/core/SkPathRef.cpp
index be7c66cc4bb8263fd2ed2b490ab20d708b0c6ba9..119711381f6f1028ed47136138770a023ee7c6c0 100644
--- a/src/core/SkPathRef.cpp
+++ b/src/core/SkPathRef.cpp
@@ -6,7 +6,7 @@
  */
 
 #include "SkBuffer.h"
-#include "SkLazyPtr.h"
+#include "SkOncePtr.h"
 #include "SkPath.h"
 #include "SkPathRef.h"
 
@@ -44,17 +44,13 @@ SkPathRef::~SkPathRef() {
     SkDEBUGCODE(fEditorsAttached = 0x7777777;)
 }
 
-// As a template argument, this must have external linkage.
-SkPathRef* sk_create_empty_pathref() {
-    SkPathRef* empty = new 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);
-
+SK_DECLARE_STATIC_ONCE_PTR(SkPathRef, empty);
 SkPathRef* SkPathRef::CreateEmpty() {
-    return SkRef(empty.get());
+    return SkRef(empty.get([]{
+        SkPathRef* pr = new SkPathRef;
+        pr->computeBounds();   // Avoids races later to be the first to do this.
+        return pr;
+    }));
 }
 
 void SkPathRef::CreateTransformedCopy(SkAutoTUnref<SkPathRef>* dst,
@@ -443,7 +439,7 @@ uint32_t SkPathRef::genID() const {
 }
 
 void SkPathRef::addGenIDChangeListener(GenIDChangeListener* listener) {
-    if (nullptr == listener || this == empty.get()) {
+    if (nullptr == listener || this == (SkPathRef*)empty) {
         delete listener;
         return;
     }