Remove ConstantExpression.value

pkg/compiler/lib/src/js_backend/codegen/glue.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_dependencies;
 
 import '../js_backend.dart';
 import '../../dart2jslib.dart';
 import '../../js_emitter/js_emitter.dart';
 import '../../js/js.dart' as js;
@@ skipping 26 matching lines @@
   }
 
   Element getStringConversion() {
     return _backend.getStringInterpolationHelper();
   }
 
   reportInternalError(String message) {
     _compiler.internalError(_compiler.currentElement, message);
   }
 
-  ConstantExpression getConstantForVariable(VariableElement variable) {
-    return _backend.constants.getConstantForVariable(variable);
+  ConstantValue getConstantValueForVariable(VariableElement variable) {
+    return _backend.constants.getConstantValueForVariable(variable);
   }
 
   js.Expression staticFunctionAccess(FunctionElement element) {
     return _backend.emitter.staticFunctionAccess(element);
   }
 
   js.Expression isolateStaticClosureAccess(FunctionElement element) {
     return _backend.emitter.isolateStaticClosureAccess(element);
   }
 
@@ skipping 164 matching lines @@
   }
 
   bool operatorEqHandlesNullArgument(FunctionElement element) {
     return _backend.operatorEqHandlesNullArgument(element);
   }
 
   bool hasStrictSubtype(ClassElement element) {
     return _compiler.world.hasAnyStrictSubtype(element);
   }
 }