Change assert implementation to not depend on a top-level function called 'assert'.

lib/compiler/implementation/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.
 
 /**
  * Assigns JavaScript identifiers to Dart variables, class-names and members.
  */
 class Namer {
   final Compiler compiler;
 
   static Set<String> _jsReserved = null;
   Set<String> get jsReserved {
     if (_jsReserved === null) {
       _jsReserved = new Set<String>();
       _jsReserved.addAll(JsNames.javaScriptKeywords);
       _jsReserved.addAll(JsNames.reservedPropertySymbols);
     }
     return _jsReserved;
   }
 
-  final Map<Element, String> globals;
-  final Map<String, int> usedGlobals;
-  final Map<String, LibraryElement> shortPrivateNameOwners;
-
-  final Map<Constant, String> constantNames;
+  Map<Element, String> globals;
+  Map<String, int> usedGlobals;
+  Map<String, LibraryElement> shortPrivateNameOwners;
 
   Namer(this.compiler)
       : globals = new Map<Element, String>(),
         usedGlobals = new Map<String, int>(),
-        shortPrivateNameOwners = new Map<String, LibraryElement>(),
-        constantNames = new Map<Constant, String>();
+        shortPrivateNameOwners = new Map<String, LibraryElement>();
 
   final String CURRENT_ISOLATE = @'$';
   final String ISOLATE = 'Isolate';
   final String ISOLATE_PROPERTIES = @"$isolateProperties";
   /** Some closures must contain their name. The name is stored in
     * [STATIC_CLOSURE_NAME_NAME]. */
   final String STATIC_CLOSURE_NAME_NAME = @'$name';
   static const SourceString CLOSURE_INVOCATION_NAME =
       Compiler.CALL_OPERATOR_NAME;
 
-  String constantName(Constant constant) {
-    // In the current implementation it doesn't make sense to give names to
-    // function constants since the function-implementation itself serves as
-    // constant and can be accessed directly.
-    assert(!constant.isFunction());
-    String result = constantNames[constant];
-    if (result === null) {
-      result = getFreshGlobalName("CTC");
-      constantNames[constant] = result;
-    }
-    return result;
-  }
 
   String closureInvocationName(Selector selector) {
     // TODO(floitsch): mangle, while not conflicting with instance names.
     return instanceMethodInvocationName(null, CLOSURE_INVOCATION_NAME,
                                         selector);
   }
 
   String breakLabelName(LabelElement label) {
     return '\$${label.labelName}\$${label.target.nestingLevel}';
   }
@@ skipping 223 matching lines @@
   }
 
   String safeName(String name) {
     if (jsReserved.contains(name) || name.startsWith('\$')) {
       name = "\$$name";
       assert(!jsReserved.contains(name));
     }
     return name;
   }
 }