Move native and js interop properties from the element model to the JS backend

pkg/compiler/lib/src/cps_ir/cps_ir_builder.dart

 // 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.
 
 library dart2js.ir_builder;
 
 import '../closure.dart' hide ClosureScope;
 import '../common.dart';
 import '../common/names.dart' show
     Names,
@@ skipping 2055 matching lines @@
         behavior);
   }
 
   /// Generate the body for a native function that redirects to a native
   /// JavaScript function, getter, or setter.
   ///
   /// Generates a call to the real target, which is given by [functions]'s
   /// `fixedBackendName`, passing all parameters as arguments.  The target can
   /// be the JavaScript implementation of a function, getter, or setter.
   void buildRedirectingNativeFunctionBody(FunctionElement function,
+                                          String name,
                                           SourceInformation source) {
-    String name = function.fixedBackendName;
     List<ir.Primitive> arguments = <ir.Primitive>[];
     NativeBehavior behavior = new NativeBehavior();
     behavior.sideEffects.setAllSideEffects();
     program.addNativeMethod(function);
     // Construct the access of the target element.
     String code = function.isInstanceMember ? '#.$name' : name;
     if (function.isInstanceMember) {
       arguments.add(state.thisParameter);
     }
     // Collect all parameters of the function and templates for them to be
@@ skipping 798 matching lines @@
 }
 
 class SwitchCaseInfo {
   final List<ir.Primitive> constants = <ir.Primitive>[];
   final SubbuildFunction buildBody;
 
   SwitchCaseInfo(this.buildBody);
 
   void addConstant(ir.Primitive constant) => constants.add(constant);
 }