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diff --git a/Source/WebCore/bindings/js/JSDOMBindingCaller.h b/Source/WebCore/bindings/js/JSDOMBindingCaller.h
new file mode 100644
index 000000000..715c6713d
--- /dev/null
+++ b/Source/WebCore/bindings/js/JSDOMBindingCaller.h
@@ -0,0 +1,102 @@
+/*
+ *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2003-2006, 2008-2009, 2013, 2016 Apple Inc. All rights reserved.
+ *  Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
+ *  Copyright (C) 2009 Google, Inc. All rights reserved.
+ *  Copyright (C) 2012 Ericsson AB. All rights reserved.
+ *  Copyright (C) 2013 Michael Pruett <michael@68k.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#pragma once
+
+#include "JSDOMExceptionHandling.h"
+
+namespace WebCore {
+
+enum class CastedThisErrorBehavior { Throw, ReturnEarly, RejectPromise, Assert };
+
+template<typename JSClass>
+struct BindingCaller {
+    using AttributeSetterFunction = bool(JSC::ExecState&, JSClass&, JSC::JSValue, JSC::ThrowScope&);
+    using AttributeGetterFunction = JSC::JSValue(JSC::ExecState&, JSClass&, JSC::ThrowScope&);
+    using OperationCallerFunction = JSC::EncodedJSValue(JSC::ExecState*, JSClass*, JSC::ThrowScope&);
+    using PromiseOperationCallerFunction = JSC::EncodedJSValue(JSC::ExecState*, JSClass*, Ref<DeferredPromise>&&, JSC::ThrowScope&);
+
+    static JSClass* castForAttribute(JSC::ExecState&, JSC::EncodedJSValue);
+    static JSClass* castForOperation(JSC::ExecState&);
+
+    template<PromiseOperationCallerFunction operationCaller, CastedThisErrorBehavior shouldThrow = CastedThisErrorBehavior::RejectPromise>
+    static JSC::EncodedJSValue callPromiseOperation(JSC::ExecState* state, Ref<DeferredPromise>&& promise, const char* operationName)
+    {
+        ASSERT(state);
+        auto throwScope = DECLARE_THROW_SCOPE(state->vm());
+        auto* thisObject = castForOperation(*state);
+        if (shouldThrow != CastedThisErrorBehavior::Assert && UNLIKELY(!thisObject))
+            return rejectPromiseWithThisTypeError(promise.get(), JSClass::info()->className, operationName);
+        ASSERT(thisObject);
+        ASSERT_GC_OBJECT_INHERITS(thisObject, JSClass::info());
+        // FIXME: We should refactor the binding generated code to use references for state and thisObject.
+        return operationCaller(state, thisObject, WTFMove(promise), throwScope);
+    }
+
+    template<OperationCallerFunction operationCaller, CastedThisErrorBehavior shouldThrow = CastedThisErrorBehavior::Throw>
+    static JSC::EncodedJSValue callOperation(JSC::ExecState* state, const char* operationName)
+    {
+        ASSERT(state);
+        auto throwScope = DECLARE_THROW_SCOPE(state->vm());
+        auto* thisObject = castForOperation(*state);
+        if (shouldThrow != CastedThisErrorBehavior::Assert && UNLIKELY(!thisObject)) {
+            if (shouldThrow == CastedThisErrorBehavior::Throw)
+                return throwThisTypeError(*state, throwScope, JSClass::info()->className, operationName);
+            // For custom promise-returning operations
+            return rejectPromiseWithThisTypeError(*state, JSClass::info()->className, operationName);
+        }
+        ASSERT(thisObject);
+        ASSERT_GC_OBJECT_INHERITS(thisObject, JSClass::info());
+        // FIXME: We should refactor the binding generated code to use references for state and thisObject.
+        return operationCaller(state, thisObject, throwScope);
+    }
+
+    template<AttributeSetterFunction setter, CastedThisErrorBehavior shouldThrow = CastedThisErrorBehavior::Throw>
+    static bool setAttribute(JSC::ExecState* state, JSC::EncodedJSValue thisValue, JSC::EncodedJSValue encodedValue, const char* attributeName)
+    {
+        ASSERT(state);
+        auto throwScope = DECLARE_THROW_SCOPE(state->vm());
+        auto* thisObject = castForAttribute(*state, thisValue);
+        if (UNLIKELY(!thisObject))
+            return (shouldThrow == CastedThisErrorBehavior::Throw) ? throwSetterTypeError(*state, throwScope, JSClass::info()->className, attributeName) : false;
+        return setter(*state, *thisObject, JSC::JSValue::decode(encodedValue), throwScope);
+    }
+
+    template<AttributeGetterFunction getter, CastedThisErrorBehavior shouldThrow = CastedThisErrorBehavior::Throw>
+    static JSC::EncodedJSValue attribute(JSC::ExecState* state, JSC::EncodedJSValue thisValue, const char* attributeName)
+    {
+        ASSERT(state);
+        auto throwScope = DECLARE_THROW_SCOPE(state->vm());
+        auto* thisObject = castForAttribute(*state, thisValue);
+        if (UNLIKELY(!thisObject)) {
+            if (shouldThrow == CastedThisErrorBehavior::Throw)
+                return throwGetterTypeError(*state, throwScope, JSClass::info()->className, attributeName);
+            if (shouldThrow == CastedThisErrorBehavior::RejectPromise)
+                return rejectPromiseWithGetterTypeError(*state, JSClass::info()->className, attributeName);
+            return JSC::JSValue::encode(JSC::jsUndefined());
+        }
+        return JSC::JSValue::encode(getter(*state, *thisObject, throwScope));
+    }
+};
+
+} // namespace WebCore