Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

tests/compiler/dart2js/list_tracer_typed_data_length_test.dart

 // Copyright (c) 2014, 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.
 
 import 'package:expect/expect.dart';
 import "package:async_helper/async_helper.dart";
-import 'package:compiler/implementation/types/types.dart'
+import 'package:compiler/src/types/types.dart'
     show ContainerTypeMask, TypeMask;
-    
+
 import 'memory_compiler.dart';
 import 'compiler_helper.dart' show findElement;
 import 'type_mask_test_helper.dart';
 
 const TEST = const {
   'main.dart' : r'''
 import 'dart:typed_data';
 
 var myList = new Float32List(42);
 var myOtherList = new Uint8List(32);
@@ skipping 15 matching lines @@
       Expect.isTrue(mask.isContainer);
       ContainerTypeMask container = mask;
       Expect.equals(type, simplify(container.elementType, compiler), name);
       Expect.equals(container.length, length);
     }
 
     checkType('myList', compiler.typesTask.numType, 42);
     checkType('myOtherList', compiler.typesTask.uint31Type, 32);
   }));
 }