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

tests/compiler/dart2js/type_test_helper.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 type_test_helper;
 
 import 'dart:async';
 import 'package:expect/expect.dart';
 import 'compiler_helper.dart' as mock;
 import 'memory_compiler.dart' as memory;
-import 'package:compiler/implementation/dart_types.dart';
-import 'package:compiler/implementation/dart2jslib.dart'
+import 'package:compiler/src/dart_types.dart';
+import 'package:compiler/src/dart2jslib.dart'
     show Compiler;
-import 'package:compiler/implementation/elements/elements.dart'
+import 'package:compiler/src/elements/elements.dart'
     show Element,
          TypeDeclarationElement,
          ClassElement;
 
 GenericType instantiate(TypeDeclarationElement element,
                         List<DartType> arguments) {
   if (element.isClass) {
     return new InterfaceType(element, arguments);
   } else {
     assert(element.isTypedef);
@@ skipping 109 matching lines @@
       namedParameters.forEach((String name, DartType type) {
         namedParameterNames.add(name);
         namedParameterTypes.add(type);
       });
     }
     return new FunctionType.synthesized(
         returnType, parameters, optionalParameters,
         namedParameterNames, namedParameterTypes);
   }
 }