Fix VariableDefinitions.endToken for formal parameters.

sdk/lib/_internal/compiler/implementation/tree/unparser.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.
 
 part of tree;
 
 String unparse(Node node) {
   Unparser unparser = new Unparser();
   unparser.unparse(node);
   return unparser.result;
@@ skipping 105 matching lines @@
 
   visitExpressionStatement(ExpressionStatement node) {
     visit(node.expression);
     add(node.endToken.value);
   }
 
   visitFor(For node) {
     add(node.forToken.value);
     sb.add('(');
     visit(node.initializer);
-    if (node.initializer is !Statement) sb.add(';');
+    sb.add(';');
     visit(node.conditionStatement);
     visit(node.update);
     sb.add(')');
     visit(node.body);
   }
 
   visitFunctionDeclaration(FunctionDeclaration node) {
     visit(node.function);
   }
 
@@ skipping 222 matching lines @@
   visitVariableDefinitions(VariableDefinitions node) {
     visit(node.modifiers);
     if (!node.modifiers.nodes.isEmpty) {
       sb.add(' ');
     }
     if (node.type != null) {
       visit(node.type);
       sb.add(' ');
     }
     visit(node.definitions);
-    if (node.endToken.value == const SourceString(';')) {
-      add(node.endToken.value);
-    }
   }
 
   visitDoWhile(DoWhile node) {
     add(node.doKeyword.value);
     if (node.body is !Block) sb.add(' ');
     visit(node.body);
     add(node.whileKeyword.value);
     visit(node.condition);
     sb.add(node.endToken.value);
   }
@@ skipping 239 matching lines @@
   }
 
   visitStatement(Statement node) {
     throw 'internal error'; // Should not be called.
   }
 
   visitStringNode(StringNode node) {
     throw 'internal error'; // Should not be called.
   }
 }