Streamline field symbol names

pkg/dev_compiler/lib/src/compiler/code_generator.dart

 // Copyright (c) 2015, 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.
 
 import 'dart:collection' show HashMap, HashSet;
 import 'dart:math' show min, max;
 
 import 'package:analyzer/analyzer.dart' hide ConstantEvaluator;
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 814 matching lines @@
     _defineClass(classElem, className, classExpr, isCallable, body);
 
     // Emit things that come after the ES6 `class ... { ... }`.
     var jsPeerNames = _getJSPeerNames(classElem);
     JS.Statement deferredBaseClass =
         _setBaseClass(classElem, className, jsPeerNames, body);
 
     _emitClassTypeTests(classElem, className, body);
 
     _defineNamedConstructors(ctors, body, className, isCallableTransitive);
-    _emitVirtualFieldSymbols(className, body);
+    _emitVirtualFieldSymbols(classElem, body);
     _emitClassSignature(
         methods, allFields, classElem, ctors, extensions, className, body);
     _defineExtensionMembers(extensions, className, body);
     _emitClassMetadata(node.metadata, className, body);
 
     JS.Statement classDef = _statement(body);
 
     var typeFormals = classElem.typeParameters;
     if (typeFormals.isNotEmpty) {
       classDef = _defineClassTypeArguments(
@@ skipping 237 matching lines @@
 
   void _emitSuperHelperSymbols(
       List<JS.TemporaryId> superHelperSymbols, List<JS.Statement> body) {
     for (var id in superHelperSymbols) {
       body.add(js.statement('const # = Symbol(#)', [id, js.string(id.name)]));
     }
     superHelperSymbols.clear();
   }
 
   void _emitVirtualFieldSymbols(
-      JS.Expression className, List<JS.Statement> body) {
+      ClassElement classElement, List<JS.Statement> body) {
     _classProperties.virtualFields.forEach((field, virtualField) {
-      body.add(js.statement('const # = Symbol(#.name + "." + #.toString());',
-          [virtualField, className, _declareMemberName(field.getter)]));
+      body.add(js.statement('const # = Symbol(#);',
+          [virtualField, js.string('${classElement.name}.${field.name}')]));
     });
   }
 
   void _defineClass(ClassElement classElem, JS.Expression className,
       JS.ClassExpression classExpr, bool isCallable, List<JS.Statement> body) {
     JS.Expression callableClass;
     if (isCallable && classElem.unnamedConstructor != null) {
       callableClass =
           _emitCallableClass(classExpr, classElem.unnamedConstructor);
     }
@@ skipping 4783 matching lines @@
   if (targetIdentifier.staticElement is! PrefixElement) return false;
   var prefix = targetIdentifier.staticElement as PrefixElement;
 
   // The library the prefix is referring to must come from a deferred import.
   var containingLibrary = resolutionMap
       .elementDeclaredByCompilationUnit(target.root as CompilationUnit)
       .library;
   var imports = containingLibrary.getImportsWithPrefix(prefix);
   return imports.length == 1 && imports[0].isDeferred;
 }