Turn ResourceLoaderSet into a part object.

third_party/WebKit/Source/core/fetch/ResourceLoaderSet.h

Index: third_party/WebKit/Source/core/fetch/ResourceLoaderSet.h
diff --git a/third_party/WebKit/Source/core/fetch/ResourceLoaderSet.h b/third_party/WebKit/Source/core/fetch/ResourceLoaderSet.h
index 7353cc074c5a666e621af5386e2fc49176ba62ff..436b57808797c87e76154230b7fb8e4224e9a323 100644
--- a/third_party/WebKit/Source/core/fetch/ResourceLoaderSet.h
+++ b/third_party/WebKit/Source/core/fetch/ResourceLoaderSet.h
@@ -33,14 +33,20 @@
 
 #include "core/fetch/ResourceLoader.h"
 #include "wtf/HashSet.h"
+#include "wtf/Noncopyable.h"
 
 namespace blink {
 
-class ResourceLoaderSet final : public GarbageCollected<ResourceLoaderSet> {
+class ResourceLoaderSet final {
+    DISALLOW_NEW();
+    WTF_MAKE_NONCOPYABLE(ResourceLoaderSet);
 public:
+    ResourceLoaderSet()
+    {
+    }
+
     using SetType = HeapHashSet<Member<ResourceLoader>>;
 
-    static ResourceLoaderSet* create();
     DECLARE_TRACE();
 
     void add(ResourceLoader* loader) { m_set.add(loader); }