Never return a Dart_Handle on a dart::Class from the embedding API.

runtime/vm/debugger_api_impl_test.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 "include/dart_mirrors_api.h"
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/thread.h"
 #include "vm/unit_test.h"
@@ skipping 945 matching lines @@
   Dart_Handle value_handle = Dart_ListGetAt(fields, 1);
   EXPECT_VALID(value_handle);
   value_handle = Dart_ToString(value_handle);
   EXPECT_VALID(value_handle);
   EXPECT(Dart_IsString(value_handle));
   char const* value;
   Dart_StringToCString(value_handle, &value);
   EXPECT_STREQ("blah blah", value);
 
   // Check static field of B's superclass.
-  Dart_Handle class_A = Dart_GetSuperclass(class_B);
+  Dart_Handle class_A = Dart_GetSupertype(class_B);
   EXPECT_VALID(class_A);
   EXPECT(!Dart_IsNull(class_A));
   fields = Dart_GetStaticFields(class_A);
   EXPECT_VALID(fields);
   EXPECT(Dart_IsList(fields));
   list_length = 0;
   retval = Dart_ListLength(fields, &list_length);
   EXPECT_VALID(retval);
   EXPECT_EQ(4, list_length);
   // Static field "bla" should have value "yada yada yada".
@@ skipping 782 matching lines @@
 
   Dart_Handle list_type = Dart_InstanceGetType(list_access_test_obj);
   Dart_Handle super_type = Dart_GetSupertype(list_type);
   EXPECT(!Dart_IsError(super_type));
   super_type = Dart_GetSupertype(super_type);
   EXPECT(!Dart_IsError(super_type));
   EXPECT(super_type == Dart_Null());
 }
 
 }  // namespace dart