Remove support for conflicting constructors.

sdk/lib/_internal/compiler/implementation/scanner/class_element_parser.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 scanner;
 
 class ClassElementParser extends PartialParser {
   ClassElementParser(Listener listener) : super(listener);
 
   Token parseClassBody(Token token) => fullParseClassBody(token);
@@ skipping 71 matching lines @@
     } else {
       Send send = nameNode.asSend();
       name = send.receiver.asIdentifier().source;
     }
     return enclosingElement.name == name;
   }
 
   // TODO(johnniwinther): Remove this method.
   SourceString getMethodNameHack(Node methodName) {
     Send send = methodName.asSend();
-    if (send == null) return methodName.asIdentifier().source;
+    if (send == null) {
+      if (isConstructorName(methodName)) return const SourceString('');
+      return methodName.asIdentifier().source;
+    }
     Identifier receiver = send.receiver.asIdentifier();
     Identifier selector = send.selector.asIdentifier();
     Operator operator = selector.asOperator();
     if (operator != null) {
       assert(identical(receiver.source.stringValue, 'operator'));
       // TODO(ahe): It is a hack to compare to ')', but it beats
       // parsing the node.
       bool isUnary = identical(operator.token.next.next.stringValue, ')');
       return Elements.constructOperatorName(operator.source, isUnary);
     } else {
-      if (receiver == null) {
-        listener.cancel('library prefix in named factory constructor not '
-                        'implemented', node: send.receiver);
-      }
-      if (receiver.source != enclosingElement.name) {
-        listener.reportErrorCode(receiver,
+      if (receiver == null || receiver.source != enclosingElement.name) {
+        listener.reportErrorCode(send.receiver,
                                  MessageKind.INVALID_CONSTRUCTOR_NAME,
                                  {'name': enclosingElement.name});
       }
-      return Elements.constructConstructorName(receiver.source,
-                                               selector.source);
+      return selector.source;
     }
   }
 
   void endMethod(Token getOrSet, Token beginToken, Token endToken) {
     super.endMethod(getOrSet, beginToken, endToken);
     FunctionExpression method = popNode();
     pushNode(null);
     bool isConstructor = isConstructorName(method.name);
     SourceString name = getMethodNameHack(method.name);
     ElementKind kind = ElementKind.FUNCTION;
@@ skipping 67 matching lines @@
 
   void endMetadata(Token beginToken, Token periodBeforeName, Token endToken) {
     popNode(); // Discard arguments.
     if (periodBeforeName != null) {
       popNode(); // Discard name.
     }
     popNode(); // Discard node (Send or Identifier).
     pushMetadata(new PartialMetadataAnnotation(beginToken, endToken));
   }
 }