[Loader] Make ThreadableLoader non-RefCounted and be managed by OwnPtr

third_party/WebKit/Source/core/loader/ThreadableLoader.h

Index: third_party/WebKit/Source/core/loader/ThreadableLoader.h
diff --git a/third_party/WebKit/Source/core/loader/ThreadableLoader.h b/third_party/WebKit/Source/core/loader/ThreadableLoader.h
index f0b47fa35e2aa5067cbbf8f04b75881c3252a035..82deb1a5643259f641aaae2d639d281c1e786486 100644
--- a/third_party/WebKit/Source/core/loader/ThreadableLoader.h
+++ b/third_party/WebKit/Source/core/loader/ThreadableLoader.h
@@ -128,7 +128,7 @@ struct CrossThreadCopier<ThreadableLoaderOptions> {
 // - ResourceLoaderOptions argument will be passed to the FetchRequest
 //   that this ThreadableLoader creates. It can be altered e.g. when
 //   redirect happens.
-class CORE_EXPORT ThreadableLoader : public RefCounted<ThreadableLoader> {
+class CORE_EXPORT ThreadableLoader {
     WTF_MAKE_NONCOPYABLE(ThreadableLoader);
 public:
     // ThreadableLoaderClient methods may not destroy the ThreadableLoader
@@ -168,8 +168,8 @@ public:
     // ThreadableLoaderClient methods:
     // - may call cancel()
     // - can destroy the ThreadableLoader instance in them (by clearing
-    //   RefPtr<ThreadableLoader>).
-    static PassRefPtr<ThreadableLoader> create(ExecutionContext&, ThreadableLoaderClient*, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
+    //   OwnPtr<ThreadableLoader>).
+    static PassOwnPtr<ThreadableLoader> create(ExecutionContext&, ThreadableLoaderClient*, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
 
     // The methods on the ThreadableLoaderClient passed on create() call
     // may be called synchronous to start() call.