Not for review - Rebase of crrev.com/62833003

Source/core/workers/Worker.h

Index: Source/core/workers/Worker.h
diff --git a/Source/core/workers/Worker.h b/Source/core/workers/Worker.h
index 42392a11ec021877279200768a957f06f511f61a..f24895b84a8fdbd73d53795dcd3300fb6bf13f4c 100644
--- a/Source/core/workers/Worker.h
+++ b/Source/core/workers/Worker.h
@@ -46,7 +46,7 @@ class ExecutionContext;
 class WorkerGlobalScopeProxy;
 class WorkerScriptLoader;
 
-class Worker final : public AbstractWorker, private WorkerScriptLoaderClient {
+class Worker : public AbstractWorker, private WorkerScriptLoaderClient {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<Worker> create(ExecutionContext*, const String& url, ExceptionState&);
@@ -65,9 +65,15 @@ public:
 
     virtual void trace(Visitor*) override;
 
-private:
+    virtual bool isUIWorker() const { return false; }
+
+protected:
     explicit Worker(ExecutionContext*);
 
+    void initScriptLoader(ExecutionContext*, const KURL& scriptURL);
+    void setContextProxy(WorkerGlobalScopeProxy*);
+
+private:
     // WorkerScriptLoaderClient callbacks
     virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&) override;
     virtual void notifyFinished() override;