Bug 1112778, part 9 - Rename JSObject::freeze -> FreezeObject and others. r=Waldo.

Some of the bits of implementation added for ES5 have been given names in ES6, so
    JSObject::sealOrFreeze -> js::SetIntegrityLevel
    JSObject::isSealedOrFrozen -> js::TestIntegrityLevel
    JSObject::ImmutabilityType -> js::IntegrityLevel

js/src/jsiter.cpp

@@ -1440,7 +1440,7 @@ GlobalObject::initStopIterationClass(JSContext *cx, Handle<GlobalObject *> globa
         return true;
 
     RootedObject proto(cx, global->createBlankPrototype(cx, &StopIterationObject::class_));
-    if (!proto || !JSObject::freeze(cx, proto))
+    if (!proto || !FreezeObject(cx, proto))
         return false;
 
     // This should use a non-JSProtoKey'd slot, but this is easier for now.