Implement eager instantiation and canonicalization of type arguments at run

runtime/vm/debugger_api_impl.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_debugger_api.h"
 
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
@@ skipping 590 matching lines @@
     const AbstractType& type = AbstractType::Handle(cls.super_type());
     if (type.IsNull()) {
       return Dart_Null();
     }
     return Api::NewHandle(isolate, type.Canonicalize());
   }
   // Set up the type arguments array for the super class type.
   const Class& super_cls = Class::Handle(cls.SuperClass());
   intptr_t num_expected_type_arguments = super_cls.NumTypeArguments();
   TypeArguments& super_type_args_array = TypeArguments::Handle();
-  const AbstractTypeArguments& type_args_array =
-      AbstractTypeArguments::Handle(type.arguments());
+  const TypeArguments& type_args_array =
+      TypeArguments::Handle(type.arguments());
   if (!type_args_array.IsNull() && (num_expected_type_arguments > 0)) {
     super_type_args_array = TypeArguments::New(num_expected_type_arguments);
     AbstractType& type_arg = AbstractType::Handle();
     for (intptr_t i = 0; i < num_expected_type_arguments; i++) {
       type_arg ^= type_args_array.TypeAt(i);
       super_type_args_array.SetTypeAt(i, type_arg);
     }
   }
 
   // Construct the super type object, canonicalize it and return.
@@ skipping 349 matching lines @@
   return Api::CastIsolate(isolate);
 }
 
 
 DART_EXPORT Dart_IsolateId Dart_GetIsolateId(Dart_Isolate dart_isolate) {
   Isolate* isolate = reinterpret_cast<Isolate*>(dart_isolate);
   return isolate->debugger()->GetIsolateId();
 }
 
 }  // namespace dart