Split the constructor of ThreadableLoader into two methods (ctor and start())

Source/core/loader/WorkerThreadableLoader.h

Index: Source/core/loader/WorkerThreadableLoader.h
diff --git a/Source/core/loader/WorkerThreadableLoader.h b/Source/core/loader/WorkerThreadableLoader.h
index 7991f822e7db6175f2caedbbc722ff72e4dec0a3..5f14bddec280358360d5b37c6d403863feef3319 100644
--- a/Source/core/loader/WorkerThreadableLoader.h
+++ b/Source/core/loader/WorkerThreadableLoader.h
@@ -54,13 +54,15 @@ namespace blink {
         WTF_MAKE_FAST_ALLOCATED(WorkerThreadableLoader);
     public:
         static void loadResourceSynchronously(WorkerGlobalScope&, const ResourceRequest&, ThreadableLoaderClient&, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
-        static PassRefPtr<WorkerThreadableLoader> create(WorkerGlobalScope& workerGlobalScope, PassRefPtr<ThreadableLoaderClientWrapper> clientWrapper, PassOwnPtr<ThreadableLoaderClient> clientBridge, const ResourceRequest& request, const ThreadableLoaderOptions& options, const ResourceLoaderOptions& resourceLoaderOptions)
+        static PassRefPtr<WorkerThreadableLoader> create(WorkerGlobalScope& workerGlobalScope, PassRefPtr<ThreadableLoaderClientWrapper> clientWrapper, PassOwnPtr<ThreadableLoaderClient> clientBridge, const ThreadableLoaderOptions& options, const ResourceLoaderOptions& resourceLoaderOptions)
         {
-            return adoptRef(new WorkerThreadableLoader(workerGlobalScope, clientWrapper, clientBridge, request, options, resourceLoaderOptions));
+            return adoptRef(new WorkerThreadableLoader(workerGlobalScope, clientWrapper, clientBridge, options, resourceLoaderOptions));
         }
 
         ~WorkerThreadableLoader() override;
 
+        void start(const ResourceRequest&) override;
+
         void overrideTimeout(unsigned long timeout) override;
 
         void cancel() override;
@@ -88,7 +90,8 @@ namespace blink {
         class MainThreadBridge final : public ThreadableLoaderClient {
         public:
             // All executed on the worker context's thread.
-            MainThreadBridge(PassRefPtr<ThreadableLoaderClientWrapper>, PassOwnPtr<ThreadableLoaderClient>, PassRefPtr<WorkerLoaderProxy>, const ResourceRequest&, const ThreadableLoaderOptions&, const ResourceLoaderOptions&, const ReferrerPolicy, const String& outgoingReferrer);
+            MainThreadBridge(PassRefPtr<ThreadableLoaderClientWrapper>, PassOwnPtr<ThreadableLoaderClient>, PassRefPtr<WorkerLoaderProxy>, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
+            void start(const ResourceRequest&, const ReferrerPolicy, const String&);
             void overrideTimeout(unsigned long timeoutMilliseconds);
             void cancel();
             void destroy();
@@ -101,7 +104,8 @@ namespace blink {
             void mainThreadDestroy(ExecutionContext*);
             ~MainThreadBridge() override;
 
-            void mainThreadCreateLoader(PassOwnPtr<CrossThreadResourceRequestData>, ThreadableLoaderOptions, ResourceLoaderOptions, const ReferrerPolicy, const String& outgoingReferrer, ExecutionContext*);
+            void mainThreadCreateLoader(ThreadableLoaderOptions, ResourceLoaderOptions, ExecutionContext*);
+            void mainThreadStart(PassOwnPtr<CrossThreadResourceRequestData>, const ReferrerPolicy, const String& outgoingReferrer);
             void mainThreadOverrideTimeout(unsigned long timeoutMilliseconds, ExecutionContext*);
             void mainThreadCancel(ExecutionContext*);
             void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent) override;
@@ -127,7 +131,7 @@ namespace blink {
             RefPtr<WorkerLoaderProxy> m_loaderProxy;
         };
 
-        WorkerThreadableLoader(WorkerGlobalScope&, PassRefPtr<ThreadableLoaderClientWrapper>, PassOwnPtr<ThreadableLoaderClient>, const ResourceRequest&, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
+        WorkerThreadableLoader(WorkerGlobalScope&, PassRefPtr<ThreadableLoaderClientWrapper>, PassOwnPtr<ThreadableLoaderClient>, const ThreadableLoaderOptions&, const ResourceLoaderOptions&);
 
         void didReceiveResourceTiming(const ResourceTimingInfo&) override;