Improve DEFINE_STATIC_LOCAL()'s handling of Blink GCed objects.

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

Index: third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
diff --git a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
index 7bd797a5fb19fe4616f5ddbcd7d818ebb913b80f..1be5fad18b2b9d9ad5c2104ec45e908da5735dee 100644
--- a/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
+++ b/third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp
@@ -141,18 +141,18 @@ ComputedStyle* StyleResolver::s_styleNotYetAvailable;
 
 static StylePropertySet* leftToRightDeclaration()
 {
-    DEFINE_STATIC_REF_WILL_BE_PERSISTENT(MutableStylePropertySet, leftToRightDecl, (MutableStylePropertySet::create(HTMLQuirksMode)));
-    if (leftToRightDecl->isEmpty())
-        leftToRightDecl->setProperty(CSSPropertyDirection, CSSValueLtr);
-    return leftToRightDecl;
+    DEFINE_STATIC_LOCAL(MutableStylePropertySet, leftToRightDecl, (MutableStylePropertySet::create(HTMLQuirksMode)));
+    if (leftToRightDecl.isEmpty())
+        leftToRightDecl.setProperty(CSSPropertyDirection, CSSValueLtr);
+    return &leftToRightDecl;
 }
 
 static StylePropertySet* rightToLeftDeclaration()
 {
-    DEFINE_STATIC_REF_WILL_BE_PERSISTENT(MutableStylePropertySet, rightToLeftDecl, (MutableStylePropertySet::create(HTMLQuirksMode)));
-    if (rightToLeftDecl->isEmpty())
-        rightToLeftDecl->setProperty(CSSPropertyDirection, CSSValueRtl);
-    return rightToLeftDecl;
+    DEFINE_STATIC_LOCAL(MutableStylePropertySet, rightToLeftDecl, (MutableStylePropertySet::create(HTMLQuirksMode)));
+    if (rightToLeftDecl.isEmpty())
+        rightToLeftDecl.setProperty(CSSPropertyDirection, CSSValueRtl);
+    return &rightToLeftDecl;
 }
 
 static void collectScopedResolversForHostedShadowTrees(const Element& element, HeapVector<Member<ScopedStyleResolver>, 8>& resolvers)