dart2js cps: Replace interceptor calls with interceptor constants.

pkg/compiler/lib/src/js_backend/codegen/codegen.dart

 // Copyright (c) 2014, 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.
 
 library code_generator;
 
 import 'glue.dart';
 
 import '../../closure.dart' show ClosureClassElement;
 import '../../common/codegen.dart' show CodegenRegistry;
@@ skipping 208 matching lines @@
         .withSourceInformation(sourceInformation);
   }
 
   @override
   js.Expression visitConstant(tree_ir.Constant node) {
     return buildConstant(
         node.value,
         sourceInformation: node.sourceInformation);
   }
 
-  js.Expression compileConstant(ParameterElement parameter) {
-    return buildConstant(glue.getConstantValueForVariable(parameter));
-  }
-
   js.Expression buildStaticInvoke(Element target,
                                   List<js.Expression> arguments,
                                   {SourceInformation sourceInformation}) {
     registry.registerStaticInvocation(target.declaration);
     js.Expression elementAccess = glue.staticFunctionAccess(target);
     return new js.Call(elementAccess, arguments,
         sourceInformation: sourceInformation);
   }
 
   @override
@@ skipping 653 matching lines @@
   js.Expression visitAwait(tree_ir.Await node) {
     return new js.Await(visitExpression(node.input));
   }
 
   visitFunctionExpression(tree_ir.FunctionExpression node) {
     // FunctionExpressions are currently unused.
     // We might need them if we want to emit raw JS nested functions.
     throw 'FunctionExpressions should not be used';
   }
 }