Add thread affinity and ASSERT() for same-thread restriction to WTF::Function

third_party/WebKit/Source/core/workers/WorkerScriptLoader.h

Index: third_party/WebKit/Source/core/workers/WorkerScriptLoader.h
diff --git a/third_party/WebKit/Source/core/workers/WorkerScriptLoader.h b/third_party/WebKit/Source/core/workers/WorkerScriptLoader.h
index ae1b922b95dcf00af55c682d44dcac06cf348a91..67c44a3b2a3cb4382ec0424df85327f3fd38be8e 100644
--- a/third_party/WebKit/Source/core/workers/WorkerScriptLoader.h
+++ b/third_party/WebKit/Source/core/workers/WorkerScriptLoader.h
@@ -61,7 +61,7 @@ public:
     // used from worker context and the worker shuts down in the middle of an
     // operation. This will cause leaks when we support nested workers.
     // Note that callbacks could be invoked before loadAsynchronously() returns.
-    void loadAsynchronously(ExecutionContext&, const KURL&, CrossOriginRequestPolicy, PassOwnPtr<Closure> responseCallback, PassOwnPtr<Closure> finishedCallback);
+    void loadAsynchronously(ExecutionContext&, const KURL&, CrossOriginRequestPolicy, PassOwnPtr<SameThreadClosure> responseCallback, PassOwnPtr<SameThreadClosure> finishedCallback);
 
     // This will immediately invoke |finishedCallback| if loadAsynchronously()
     // is in progress.
@@ -105,8 +105,8 @@ private:
     void processContentSecurityPolicy(const ResourceResponse&);
 
     // Callbacks for loadAsynchronously().
-    OwnPtr<Closure> m_responseCallback;
-    OwnPtr<Closure> m_finishedCallback;
+    OwnPtr<SameThreadClosure> m_responseCallback;
+    OwnPtr<SameThreadClosure> m_finishedCallback;
 
     RefPtr<ThreadableLoader> m_threadableLoader;
     String m_responseEncoding;