Simplify constructors translation, improve code style.

pkg/analyzer_experimental/test/generated/test_support.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 library engine.test_support;
 import 'dart:collection';
 import 'package:analyzer_experimental/src/generated/java_core.dart';
 import 'package:analyzer_experimental/src/generated/java_engine.dart';
 import 'package:analyzer_experimental/src/generated/java_junit.dart';
 import 'package:analyzer_experimental/src/generated/source.dart';
 import 'package:analyzer_experimental/src/generated/error.dart';
 import 'package:analyzer_experimental/src/generated/scanner.dart';
@@ skipping 29 matching lines @@
   Map<Source, LineInfo> _lineInfoMap = new Map<Source, LineInfo>();
 
   /**
    * An empty array of errors used when no errors are expected.
    */
   static List<AnalysisError> _NO_ERRORS = new List<AnalysisError>(0);
 
   /**
    * Initialize a newly created error listener to collect errors.
    */
-  GatheringErrorListener() : super() {
-    _jtd_constructor_364_impl();
-  }
-  _jtd_constructor_364_impl() {
-  }
+  GatheringErrorListener() : super();
 
   /**
    * Initialize a newly created error listener to collect errors.
    */
-  GatheringErrorListener.con1(String rawSource2) {
-    _jtd_constructor_365_impl(rawSource2);
-  }
-  _jtd_constructor_365_impl(String rawSource2) {
-    this._rawSource = rawSource2;
-    this._markedSource = rawSource2;
+  GatheringErrorListener.con1(String rawSource) {
+    this._rawSource = rawSource;
+    this._markedSource = rawSource;
   }
 
   /**
    * Add all of the errors recorded by the given listener to this listener.
    *
    * @param listener the listener that has recorded the errors to be added
    */
   void addAll(RecordingErrorListener listener) {
     for (AnalysisError error in listener.errors) {
       onError(error);
@@ skipping 756 matching lines @@
         return trampoline(target, arguments[0], arguments[1]);
       case 3:
         return trampoline(target, arguments[0], arguments[1], arguments[2]);
       case 4:
         return trampoline(target, arguments[0], arguments[1], arguments[2], arguments[3]);
       default:
         throw new IllegalArgumentException("Not implemented for > 4 arguments");
     }
   }
 }