[turbofan] Remove the TryLowerDirectJSCall hack from generic lowering.

src/types.h

Index: src/types.h
diff --git a/src/types.h b/src/types.h
index 8f806245327100a867b9f292527547cc1b0013ca..228b6d0773181ce1a4c5a37ad4943e27419f6be9 100644
--- a/src/types.h
+++ b/src/types.h
@@ -233,6 +233,7 @@ namespace internal {
   V(Detectable,          kDetectableReceiver | kNumber | kName) \
   V(Object,              kDetectableObject | kUndetectable) \
   V(Receiver,            kObject | kProxy) \
+  V(ReceiverOrUndefined, kReceiver | kUndefined) \
   V(StringOrReceiver,    kString | kReceiver) \
   V(Unique,              kBoolean | kUniqueName | kNull | kUndefined | \
                          kReceiver) \
@@ -410,6 +411,14 @@ class TypeImpl : public Config::Base {
     function->InitParameter(2, param2);
     return function;
   }
+  static TypeHandle Function(TypeHandle result, int arity, TypeHandle* params,
+                             Region* region) {
+    FunctionHandle function = Function(result, Any(region), arity, region);
+    for (int i = 0; i < arity; ++i) {
+      function->InitParameter(i, params[i]);
+    }
+    return function;
+  }
 
   static TypeHandle Union(TypeHandle type1, TypeHandle type2, Region* reg);
   static TypeHandle Intersect(TypeHandle type1, TypeHandle type2, Region* reg);