dart2js: Don't emit fields that are named "eval" or "arguments".

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

 // Copyright (c) 2011, 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_backend;
 
 /**
  * Assigns JavaScript identifiers to Dart variables, class-names and members.
  */
 class Namer implements ClosureNamer {
 
   static const javaScriptKeywords = const <String>[
     // These are current keywords.
     "break", "delete", "function", "return", "typeof", "case", "do", "if",
     "switch", "var", "catch", "else", "in", "this", "void", "continue",
     "false", "instanceof", "throw", "while", "debugger", "finally", "new",
     "true", "with", "default", "for", "null", "try",
 
     // These are future keywords.
     "abstract", "double", "goto", "native", "static", "boolean", "enum",
     "implements", "package", "super", "byte", "export", "import", "private",
     "synchronized", "char", "extends", "int", "protected", "throws",
     "class", "final", "interface", "public", "transient", "const", "float",
     "long", "short", "volatile"
   ];
 
   static const reservedPropertySymbols =
-      const <String>["__proto__", "prototype", "constructor", "call"];
+      const <String>[
+        "__proto__", "prototype", "constructor", "call",
+        // "use strict" disallows the use of "arguments" and "eval" as
+        // variable names or property names. See ECMA-262, Edition 5.1,
+        // section 11.1.5 (for the property names).
+        "eval", "arguments"];
 
   // Symbols that we might be using in our JS snippets.
   static const reservedGlobalSymbols = const <String>[
     // Section references are from Ecma-262
     // (http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf)
 
     // 15.1.1 Value Properties of the Global Object
     "NaN", "Infinity", "undefined",
 
     // 15.1.2 Function Properties of the Global Object
@@ skipping 1388 matching lines @@
         if (!first) {
           sb.write('_');
         }
         sb.write('_');
         visit(parameter);
         first = true;
       }
     }
   }
 }