Move frog/leg to lib/compiler/implementation.

frog/leg/scanner/motile_d8.dart

Index: frog/leg/scanner/motile_d8.dart
===================================================================
--- frog/leg/scanner/motile_d8.dart	(revision 5925)
+++ frog/leg/scanner/motile_d8.dart	(working copy)
@@ -1,14 +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.
-
-#library('motile'); // aka parser'
-#import('scannerlib.dart');
-#import('scanner_implementation.dart');
-#import('../elements/elements.dart');
-#import('d8_scanner_bench.dart', prefix: 'd8');
-#import('scanner_bench.dart');
-#source('parser_bench.dart');
-
-class BaseParserBench extends d8.D8ScannerBench {
-}