[cleanup] remove PropertyName from js_ast

lib/src/js/printer.dart

 // Copyright (c) 2012, 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.
 
 part of js_ast;
 
 
 class JavaScriptPrintingOptions {
   final bool shouldCompressOutput;
   final bool minifyLocalVariables;
@@ skipping 1008 matching lines @@
     // TODO(jmesserly): async modifiers
     if (fun.body.statements.isEmpty) {
       spaceOut();
       out("{}");
     } else {
       blockBody(fun.body, needsSeparation: false, needsNewline: false);
     }
     localNamer.leaveScope();
   }
 
-  visitPropertyName(PropertyName node) => propertyNameOut(node);
-
   void propertyNameOut(Expression node, {bool inMethod: false,
       bool inAccess: false}) {
 
     if (node is LiteralNumber) {
       LiteralNumber nameNumber = node;
       if (inAccess) out('[');
       out(nameNumber.value);
       if (inAccess) out(']');
     } else {
-      String quotedName;
-      if (node is PropertyName) {
-        quotedName = "'${node.name}'";
-      } else if (node is LiteralString) {
-        quotedName = node.value;
-      }
-      if (quotedName != null) {
+      if (node is LiteralString) {
+        var quotedName = node.value;
         if (isValidJavaScriptId(quotedName)) {
           if (inAccess) out('.');
           out(quotedName.substring(1, quotedName.length - 1));
         } else {
           if (inMethod || inAccess) out("[");
           out(quotedName);
           if (inMethod || inAccess) out("]");
         }
       } else {
         // ComputedPropertyName
@@ skipping 36 matching lines @@
 
   visitInterpolatedLiteral(InterpolatedLiteral node) =>
       visitInterpolatedNode(node);
 
   visitInterpolatedParameter(InterpolatedParameter node) =>
       visitInterpolatedNode(node);
 
   visitInterpolatedSelector(InterpolatedSelector node) =>
       visitInterpolatedNode(node);
 
-  visitInterpolatedPropertyName(InterpolatedPropertyName node) =>
-      visitInterpolatedNode(node);
-
   visitInterpolatedMethod(InterpolatedMethod node) =>
       visitInterpolatedNode(node);
 
   visitInterpolatedVariableDeclaration(InterpolatedVariableDeclaration node) =>
       visitInterpolatedNode(node);
 
   visitInterpolatedStatement(InterpolatedStatement node) {
     outLn('#${node.nameOrPosition}');
   }
 
@@ skipping 289 matching lines @@
         codes.add(nthLetter((n ~/ nameSpaceSize) % LETTERS));
       }
       codes.add(charCodes.$0 + digit);
       newName = new String.fromCharCodes(codes);
     }
     assert(new RegExp(r'[a-zA-Z][a-zA-Z0-9]*').hasMatch(newName));
     maps.last[oldName] = newName;
     return newName;
   }
 }