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

third_party/WebKit/Source/platform/ThreadSafeFunctional.h

Index: third_party/WebKit/Source/platform/ThreadSafeFunctional.h
diff --git a/third_party/WebKit/Source/platform/ThreadSafeFunctional.h b/third_party/WebKit/Source/platform/ThreadSafeFunctional.h
index b8f9c1e05ce01062d907e8545893781daecb5c0d..855cdb558b9bdd4486ce433cbbd05c37bb4cf2da 100644
--- a/third_party/WebKit/Source/platform/ThreadSafeFunctional.h
+++ b/third_party/WebKit/Source/platform/ThreadSafeFunctional.h
@@ -27,11 +27,12 @@ namespace blink {
 //     bind(func1, 42, str.isolatedCopy());
 
 template<typename... FreeVariableTypes, typename FunctionType, typename... Ps>
-PassOwnPtr<Function<typename WTF::FunctionWrapper<FunctionType>::ResultType(FreeVariableTypes...)>> threadSafeBind(
+PassOwnPtr<Function<typename WTF::FunctionWrapper<FunctionType>::ResultType(FreeVariableTypes...), WTF::CrossThreadAffinity>> threadSafeBind(
     FunctionType function,
     const Ps&... parameters)
 {
-    return bind<FreeVariableTypes...>(function,
+    return WTF::bindInternal<WTF::CrossThreadAffinity, FreeVariableTypes...>(
+        function,
         CrossThreadCopier<Ps>::copy(parameters)...);
 }