Move pub into sdk/lib/_internal.

sdk/lib/_internal/pub/test/command_line_config.dart

 // Copyright (c) 2013, 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 command_line_config;
 
 import 'dart:io';
 import 'dart:math' as math;
 
 import 'package:pathos/path.dart' as path;
 import 'package:unittest/unittest.dart';
-import '../../pub/utils.dart';
+import '../lib/src/utils.dart';
 
 /// Gets a "special" string (ANSI escape or Unicode). On Windows, returns
 /// something else since those aren't supported.
 String _getSpecial(String color, [String onWindows = '']) {
   // No ANSI escapes on windows.
   if (Platform.operatingSystem == 'windows') return onWindows;
   return color;
 }
 
 /// Pretty Unicode characters!
@@ skipping 139 matching lines @@
     var library = match[2];
     if (!isCore) {
       // Make the library path relative to the entrypoint.
       library = path.relative(library);
     }
 
     var member = match[1].replaceAll("<anonymous closure>", _lambda);
     return new _StackFrame._(isCore, library, match[3], match[4], member);
   }
 }