Reject constructor names that conflict with members.

dart/sdk/lib/_internal/compiler/implementation/elements/elements.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.
 
 library elements;
 
 import 'dart:uri';
 
 // TODO(ahe): Rename prefix to 'api' when VM bug is fixed.
 import '../../compiler.dart' as api_e;
@@ skipping 1839 matching lines @@
     return isLocal(element);
   }
 
   static SourceString constructConstructorName(SourceString receiver,
                                                SourceString selector) {
     String r = receiver.slowToString();
     String s = selector.slowToString();
     return new SourceString('$r\$$s');
   }
 
+  static SourceString deconstructConstructorName(SourceString name,
+                                                 ClassElement holder) {
+    String r = '${holder.name.slowToString()}\$';
+    String s = name.slowToString();
+    if (s.startsWith(r)) {
+      return new SourceString(s.substring(r.length));
+    }
+    return null;
+  }
+
   /**
    * Map an operator-name to a valid Dart identifier.
    *
    * For non-operator names, this metod just returns its input.
    *
    * The results returned from this method are guaranteed to be valid
    * JavaScript identifers, except it may include reserved words for
    * non-operator names.
    */
   static SourceString operatorNameToIdentifier(SourceString name) {
@@ skipping 244 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }