Use ConstExp for storing constants.

sdk/lib/_internal/compiler/implementation/js_backend/type_variable_handler.dart

Index: sdk/lib/_internal/compiler/implementation/js_backend/type_variable_handler.dart
diff --git a/sdk/lib/_internal/compiler/implementation/js_backend/type_variable_handler.dart b/sdk/lib/_internal/compiler/implementation/js_backend/type_variable_handler.dart
index a336f32f8834e4aff0f880e9716c488243b1e7f8..76a8a8ceec8e78456b71af459fbdd50d6c8029d9 100644
--- a/sdk/lib/_internal/compiler/implementation/js_backend/type_variable_handler.dart
+++ b/sdk/lib/_internal/compiler/implementation/js_backend/type_variable_handler.dart
@@ -65,27 +65,42 @@ class TypeVariableHandler {
     List<int> constants = <int>[];
 
     for (TypeVariableType currentTypeVariable in cls.typeVariables) {
-      List<Constant> createArguments(FunctionElement constructor) {
-      if (constructor != typeVariableConstructor) {
-          compiler.internalError(currentTypeVariable.element,
-              'Unexpected constructor $constructor');
-        }
-        Constant name = backend.constantSystem.createString(
-            new DartString.literal(currentTypeVariable.name));
-        Constant bound = backend.constantSystem.createInt(
-            emitter.reifyType(currentTypeVariable.element.bound));
-        Constant type = backend.constants.createTypeConstant(cls);
-        return [type, name, bound];
+      TypeVariableElement typeVariableElement = currentTypeVariable.element;
+
+      AstConstant wrapConstant(ConstExp constant) {
+        return new AstConstant(typeVariableElement,
+                                     typeVariableElement.node,
+                                     constant);
       }
 
-      Constant c = CompileTimeConstantEvaluator.makeConstructedConstant(
-          compiler, backend.constants,
-          currentTypeVariable.element, typeVariableType,
-          typeVariableConstructor, createArguments);
-      backend.registerCompileTimeConstant(c, compiler.globalDependencies);
-      backend.constants.addCompileTimeConstantForEmission(c);
+      ConstExp name = new PrimitiveConstExp(
+          backend.constantSystem.createString(
+              new DartString.literal(currentTypeVariable.name)));
+      ConstExp bound = new PrimitiveConstExp(
+          backend.constantSystem.createInt(
+              emitter.reifyType(typeVariableElement.bound)));
+      ConstExp type = backend.constants.createTypeConstant(cls);
+      List<AstConstant> arguments =
+          [wrapConstant(type), wrapConstant(name), wrapConstant(bound)];
+
+      // TODO(johnniwinther): Support a less front-end specific creation of
+      // constructed constants.
+      AstConstant constant =
+          CompileTimeConstantEvaluator.makeConstructedConstant(
+              compiler,
+              backend.constants,
+              typeVariableElement,
+              typeVariableElement.node,
+              typeVariableType,
+              typeVariableConstructor,
+              new Selector.callConstructor('', null, 3),
+              arguments,
+              arguments);
+      Constant value = constant.value;
+      backend.registerCompileTimeConstant(value, compiler.globalDependencies);
+      backend.constants.addCompileTimeConstantForEmission(value);
       constants.add(
-          reifyTypeVariableConstant(c, currentTypeVariable.element));
+          reifyTypeVariableConstant(value, currentTypeVariable.element));
     }
     typeVariables[cls] = constants;
   }