Convert double interface into abstract class

runtime/vm/object_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 "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ skipping 96 matching lines @@
   interfaces.SetAt(0, Type::Handle(Type::NewNonParameterizedType(interface)));
   interface_name = Symbols::New("Norton");
   interface = Class::New(interface_name, script, Scanner::kDummyTokenIndex);
   interfaces.SetAt(1, Type::Handle(Type::NewNonParameterizedType(interface)));
   cls.set_interfaces(interfaces);
   cls.Finalize();
 }
 
 
 TEST_CASE(TypeArguments) {
-  const Type& type1 = Type::Handle(Type::DoubleInterface());
+  const Type& type1 = Type::Handle(Type::Double());
   const Type& type2 = Type::Handle(Type::StringInterface());
   const TypeArguments& type_arguments1 = TypeArguments::Handle(
     TypeArguments::New(2));
   type_arguments1.SetTypeAt(0, type1);
   type_arguments1.SetTypeAt(1, type2);
   const TypeArguments& type_arguments2 = TypeArguments::Handle(
     TypeArguments::New(2));
   type_arguments2.SetTypeAt(0, type1);
   type_arguments2.SetTypeAt(1, type2);
   EXPECT_NE(type_arguments1.raw(), type_arguments2.raw());
@@ skipping 2976 matching lines @@
   isolate->heap()->CollectAllGarbage();
   EXPECT(weak1.key() == Object::null());
   EXPECT(weak1.value() == Object::null());
   EXPECT(weak2.key() == Object::null());
   EXPECT(weak2.value() == Object::null());
 }
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart