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

tests/compiler/dart2js/field_type_simple_inferer_test.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.
 
 import 'dart:async';
 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 TypeMask;
 
 import 'compiler_helper.dart';
 import 'parser_helper.dart';
 import 'type_mask_test_helper.dart';
 
 void compileAndFind(String code,
                     String className,
                     String memberName,
                     bool disableInlining,
@@ skipping 547 matching lines @@
 
   runTest(TEST_25, {'f1': (types) => types.uint31Type });
   runTest(TEST_26, {'f1': (types) => types.positiveIntType });
   runTest(TEST_27, {'f1': (types) => types.uint31Type,
                     'f2': (types) => types.uint31Type.nullable()});
 }
 
 void main() {
   test();
 }