Remove additional duplicate errors

pkg/analyzer/lib/src/task/dart.dart

 // Copyright (c) 2015, 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 analyzer.src.task.dart;
 
 import 'dart:collection';
 import 'dart:math' as math;
 
 import 'package:analyzer/src/context/cache.dart';
@@ skipping 405 matching lines @@
         'VERIFY_ERRORS', AnalysisError.NO_ERRORS);
 
 /**
  * Remove [CompileTimeErrorCode.DUPLICATE_DEFINITION] errors from the given
  * [errors] list.
  */
 void removeDuplicateDefinitionErrors(List<AnalysisError> errors) {
   if (errors.isNotEmpty) {
     errors.removeWhere((error) {
       ErrorCode errorCode = error.errorCode;
-      return errorCode == CompileTimeErrorCode.DUPLICATE_DEFINITION;
+      return errorCode == CompileTimeErrorCode.DUPLICATE_DEFINITION ||
+          errorCode == CompileTimeErrorCode.GETTER_AND_METHOD_WITH_SAME_NAME ||
+          errorCode ==
+              CompileTimeErrorCode.PREFIX_COLLIDES_WITH_TOP_LEVEL_MEMBER;
     });
   }
 }
 
 /**
  * A task that builds implicit constructors for a [ClassElement], or keeps
  * the existing explicit constructors if the class has them.
  */
 class BuildClassConstructorsTask extends SourceBasedAnalysisTask {
   /**
@@ skipping 2991 matching lines @@
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.first;
     _newSources.remove(currentTarget);
     return true;
   }
 }