Bug 941437 part 1. Remove the unused cx argument from dom::UnwrapObject. r=smaug

dom/bindings/BindingUtils.cpp

@@ -1793,10 +1793,10 @@ ReparentWrapper(JSContext* aCx, JS::Handle<JSObject*> aObjArg)
   nsresult rv = UNWRAP_OBJECT(HTMLObjectElement, aCx, aObj, htmlobject);
   if (NS_FAILED(rv)) {
     rv = UnwrapObject<prototypes::id::HTMLEmbedElement,
-                      HTMLSharedObjectElement>(aCx, aObj, htmlobject);
+                      HTMLSharedObjectElement>(aObj, htmlobject);
     if (NS_FAILED(rv)) {
       rv = UnwrapObject<prototypes::id::HTMLAppletElement,
-                        HTMLSharedObjectElement>(aCx, aObj, htmlobject);
+                        HTMLSharedObjectElement>(aObj, htmlobject);
       if (NS_FAILED(rv)) {
         htmlobject = nullptr;
       }

dom/bindings/BindingUtils.h

@@ -195,7 +195,7 @@ IsDOMObject(JSObject* obj)
 
 #define UNWRAP_OBJECT(Interface, cx, obj, value)                             \
   mozilla::dom::UnwrapObject<mozilla::dom::prototypes::id::Interface,        \
-    mozilla::dom::Interface##Binding::NativeType>(cx, obj, value)
+    mozilla::dom::Interface##Binding::NativeType>(obj, value)
 
 // Some callers don't want to set an exception when unwrapping fails
 // (for example, overload resolution uses unwrapping to tell what sort
@@ -203,7 +203,7 @@ IsDOMObject(JSObject* obj)
 // U must be something that a T* can be assigned to (e.g. T* or an nsRefPtr<T>).
 template <prototypes::ID PrototypeID, class T, typename U>
 MOZ_ALWAYS_INLINE nsresult
-UnwrapObject(JSContext* cx, JSObject* obj, U& value)
+UnwrapObject(JSObject* obj, U& value)
 {
   /* First check to see whether we have a DOM object */
   const DOMClass* domClass = GetDOMClass(obj);

dom/bindings/Codegen.py

@@ -2536,7 +2536,7 @@ class CastableObjectUnwrapper():
         codeOnFailure = self.substitution["codeOnFailure"] % {'securityError': 'rv == NS_ERROR_XPC_SECURITY_MANAGER_VETO'}
         return string.Template(
 """{
-  nsresult rv = UnwrapObject<${protoID}, ${type}>(cx, ${source}, ${target});
+  nsresult rv = UnwrapObject<${protoID}, ${type}>(${source}, ${target});
   if (NS_FAILED(rv)) {
 ${codeOnFailure}
   }

dom/workers/WorkerScope.cpp

@@ -24,7 +24,7 @@
 
 #define UNWRAP_WORKER_OBJECT(Interface, cx, obj, value)                       \
   UnwrapObject<prototypes::id::Interface##_workers,                           \
-    mozilla::dom::Interface##Binding_workers::NativeType>(cx, obj, value)
+    mozilla::dom::Interface##Binding_workers::NativeType>(obj, value)
 
 using namespace mozilla::dom;
 USING_WORKERS_NAMESPACE