Support fast noSuchMethod dispatch for any number of arguments.

runtime/vm/object.h

Index: runtime/vm/object.h
===================================================================
--- runtime/vm/object.h	(revision 24510)
+++ runtime/vm/object.h	(working copy)
@@ -912,6 +912,9 @@
 
   RawArray* constants() const;
 
+  RawFunction* GetNoSuchMethodDispatcher(const String& target_name,
+                                         const Array& args_desc) const;
+
   void Finalize() const;
 
   const char* ApplyPatch(const Class& patch) const;
@@ -1001,6 +1004,10 @@
   void set_canonical_types(const Array& value) const;
   RawArray* canonical_types() const;
 
+  RawArray* no_such_method_cache() const;
+  void set_no_such_method_cache(const Array& cache) const;
+  RawFunction* CreateNoSuchMethodDispatcher(const String& target_name,
+                                            const Array& args_desc) const;
   void CalculateFieldOffsets() const;
 
   // Assigns empty array to all raw class array fields.
@@ -1407,6 +1414,9 @@
   void set_extracted_method_closure(const Function& function) const;
   RawFunction* extracted_method_closure() const;
 
+  void set_saved_args_desc(const Array& array) const;
+  RawArray* saved_args_desc() const;
+
   bool IsMethodExtractor() const {
     return kind() == RawFunction::kMethodExtractor;
   }