Improve NoSuchMethodError error messages

runtime/vm/object.h

Index: runtime/vm/object.h
===================================================================
--- runtime/vm/object.h	(revision 27783)
+++ runtime/vm/object.h	(working copy)
@@ -1416,6 +1416,10 @@
   // does not involve generic parameter types or generic result type.
   bool HasInstantiatedSignature() const;
 
+  // Build a string of the form 'T, {b: B, c: C} representing the user
+  // visible parameter types of the function.
+  RawString* UserVisibleParameterSignature() const;

[regis, 2013/09/24 01:10:24]

How about UserVisibleFormalParameters?

[hausner, 2013/09/24 16:17:09]

Much better. Done.

+
   RawClass* Owner() const;
   RawClass* origin() const;
   RawScript* script() const;
@@ -1863,6 +1867,11 @@
   void set_data(const Object& value) const;
   static RawFunction* New();
 
+  void ParameterSignatureHelper(

[regis, 2013/09/24 01:10:24]

The term ParameterSignature could mean other things.
How about BuildFormalParameters?

[hausner, 2013/09/24 16:17:09]

How about BuildSinatureParameters (the parameter portion of BuildSignature)?

+      bool instantiate,
+      NameVisibility name_visibility,
+      const AbstractTypeArguments& instantiator,
+      const GrowableObjectArray& pieces) const;
   RawString* BuildSignature(bool instantiate,
                             NameVisibility name_visibility,
                             const AbstractTypeArguments& instantiator) const;