Remove support for conflicting constructors.

sdk/lib/_internal/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.
 
 part of js_backend;
 
 /**
  * Assigns JavaScript identifiers to Dart variables, class-names and members.
  */
 class Namer implements ClosureNamer {
@@ skipping 299 matching lines @@
     // TODO(erikcorry): Fix this with other manglings to avoid clashes.
     return '_lib$libraryName\$$nameString';
   }
 
   String instanceMethodName(FunctionElement element) {
     SourceString elementName = element.name;
     SourceString name = operatorNameToIdentifier(elementName);
     if (name != elementName) return getMappedOperatorName(name.slowToString());
 
     LibraryElement library = element.getLibrary();
-    if (element.kind == ElementKind.GENERATIVE_CONSTRUCTOR_BODY) {
-      ConstructorBodyElement bodyElement = element;
-      name = bodyElement.constructor.name;
+    if (element.isGenerativeConstructorBody()) {
+      name = Elements.reconstructConstructorNameSourceString(element);
     }
     FunctionSignature signature = element.computeSignature(compiler);
     String methodName =
         '${privateName(library, name)}\$${signature.parameterCount}';
     if (signature.optionalParametersAreNamed &&
         !signature.optionalParameters.isEmpty) {
       StringBuffer buffer = new StringBuffer();
       signature.orderedOptionalParameters.forEach((Element element) {
         buffer.write('\$${safeName(element.name.slowToString())}');
       });
@@ skipping 176 matching lines @@
   static const String LIBRARY_PREFIX = "lib";
 
   /**
    * Returns a preferred JS-id for the given top-level or static element.
    * The returned id is guaranteed to be a valid JS-id.
    */
   String _computeGuess(Element element) {
     assert(!element.isInstanceMember());
     String name;
     if (element.isGenerativeConstructor()) {
-      if (element.name == element.getEnclosingClass().name) {
-        // Keep the class name for the class and not the factory.
-        name = "${element.name.slowToString()}\$";
-      } else {
-        name = element.name.slowToString();
-      }
+      name = "${element.getEnclosingClass().name.slowToString()}\$"
+             "${element.name.slowToString()}";
+    } else if (element.isFactoryConstructor()) {
+      // TODO(johnniwinther): Change factory name encoding as to not include
+      // the class-name twice.
+      String className = element.getEnclosingClass().name.slowToString();
+      name = '${className}_${Elements.reconstructConstructorName(element)}';
     } else if (Elements.isStaticOrTopLevel(element)) {
       if (element.isMember()) {
         ClassElement enclosingClass = element.getEnclosingClass();
         name = "${enclosingClass.name.slowToString()}_"
                "${element.name.slowToString()}";
       } else {
         name = element.name.slowToString();
       }
     } else if (element.isLibrary()) {
       name = LIBRARY_PREFIX;
@@ skipping 715 matching lines @@
         if (!first) {
           sb.write('_');
         }
         sb.write('_');
         visit(link.head);
         first = true;
       }
     }
   }
 }