Move frog/leg to lib/compiler/implementation.

frog/leg/scanner/parser_task.dart

Index: frog/leg/scanner/parser_task.dart
===================================================================
--- frog/leg/scanner/parser_task.dart	(revision 5925)
+++ frog/leg/scanner/parser_task.dart	(working copy)
@@ -1,12 +0,0 @@
-// 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.
-
-class ParserTask extends CompilerTask {
-  ParserTask(Compiler compiler) : super(compiler);
-  String get name() => 'Parser';
-
-  Node parse(Element element) {
-    return measure(() => element.parseNode(compiler));
-  }
-}