[Interpreter] Add support for JS calls.

src/compiler/raw-machine-assembler.h

Index: src/compiler/raw-machine-assembler.h
diff --git a/src/compiler/raw-machine-assembler.h b/src/compiler/raw-machine-assembler.h
index 6e081ccaacd8f115ed3a7c697771eb25c4251158..b4b66a8bfa7f306f8db0b81d3e620a9d61b50a26 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -482,6 +482,9 @@ class RawMachineAssembler {
                             Node* frame_state);
   // Tail call the given call descriptor and the given arguments.
   Node* TailCallN(CallDescriptor* call_descriptor, Node* function, Node** args);
+  // Call a given call descriptor with a variable number of arguments.
+  Node* CallVarArgs(CallDescriptor* desc, Node* function, Node** fixed_args,
+                    Node* first_var_arg, Node* last_var_arg);
   // Call through CallFunctionStub with lazy deopt and frame-state.
   Node* CallFunctionStub0(Node* function, Node* receiver, Node* context,
                           Node* frame_state, CallFunctionFlags flags);