Add Dart_GetSupertype to the dart debugger API so that the dartium

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, 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_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
@@ skipping 3737 matching lines @@
     // Set up the type arguments array.
     type_args_obj ^= TypeArguments::New(num_expected_type_arguments);
     AbstractType& type_arg = AbstractType::Handle();
     for (intptr_t i = 0; i < number_of_type_arguments; i++) {
       type_arg ^= array.At(i);
       type_args_obj.SetTypeAt(i, type_arg);
     }
   }
 
   // Construct the type object, canonicalize it and return.
-  const Type& instantiated_type = Type::Handle(
+  Type& instantiated_type = Type::Handle(
       Type::New(cls, type_args_obj, Scanner::kDummyTokenIndex));
-  ClassFinalizer::FinalizeType(cls,
-                               instantiated_type,
-                               ClassFinalizer::kCanonicalize);
+  instantiated_type ^= ClassFinalizer::FinalizeType(
+      cls, instantiated_type, ClassFinalizer::kCanonicalize);
   return Api::NewHandle(isolate, instantiated_type.raw());
 }
 
 
 DART_EXPORT Dart_Handle Dart_LibraryUrl(Dart_Handle library) {
   Isolate* isolate = Isolate::Current();
   DARTSCOPE(isolate);
   const Library& lib = Api::UnwrapLibraryHandle(isolate, library);
   if (lib.IsNull()) {
     RETURN_TYPE_ERROR(isolate, library, Library);
@@ skipping 215 matching lines @@
   }
   {
     NoGCScope no_gc;
     RawObject* raw_obj = obj.raw();
     isolate->heap()->SetPeer(raw_obj, peer);
   }
   return Api::Success();
 }
 
 }  // namespace dart