Update imports to use package:compiler and package:try.

dart/tests/compiler/dart2js/compiler_helper.dart

 // Copyright (c) 2012, 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.
 // Test constant folding.
 
 library compiler_helper;
 
 import 'dart:async';
 import "package:expect/expect.dart";
 
-import '../../../sdk/lib/_internal/compiler/implementation/elements/elements.dart'
+import 'package:compiler/implementation/elements/elements.dart'
        as lego;
-export '../../../sdk/lib/_internal/compiler/implementation/elements/elements.dart';
+export 'package:compiler/implementation/elements/elements.dart';
 
-import '../../../sdk/lib/_internal/compiler/implementation/js_backend/js_backend.dart'
+import 'package:compiler/implementation/js_backend/js_backend.dart'
        as js;
 
-import '../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart'
+import 'package:compiler/implementation/dart2jslib.dart'
        as leg;
-export '../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart'
+export 'package:compiler/implementation/dart2jslib.dart'
        show Constant,
             Message,
             MessageKind,
             Selector,
             TypedSelector,
             SourceSpan;
 
-import '../../../sdk/lib/_internal/compiler/implementation/ssa/ssa.dart' as ssa;
+import 'package:compiler/implementation/ssa/ssa.dart' as ssa;
 
-import '../../../sdk/lib/_internal/compiler/implementation/types/types.dart'
+import 'package:compiler/implementation/types/types.dart'
        as types;
-export '../../../sdk/lib/_internal/compiler/implementation/types/types.dart'
+export 'package:compiler/implementation/types/types.dart'
        show TypeMask;
 
-import '../../../sdk/lib/_internal/compiler/implementation/util/util.dart';
-export '../../../sdk/lib/_internal/compiler/implementation/util/util.dart';
+import 'package:compiler/implementation/util/util.dart';
+export 'package:compiler/implementation/util/util.dart';
 
-import '../../../sdk/lib/_internal/compiler/implementation/source_file.dart';
+import 'package:compiler/implementation/source_file.dart';
 
-import '../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart'
+import 'package:compiler/implementation/dart2jslib.dart'
        show Compiler;
 
-export '../../../sdk/lib/_internal/compiler/implementation/tree/tree.dart';
+export 'package:compiler/implementation/tree/tree.dart';
 
 import 'mock_compiler.dart';
 export 'mock_compiler.dart';
 
 Future<String> compile(String code,
                        {String entry: 'main',
                         String coreSource: DEFAULT_CORELIB,
                         String interceptorsSource: DEFAULT_INTERCEPTORSLIB,
                         bool enableTypeAssertions: false,
                         bool minify: false,
@@ skipping 186 matching lines @@
     regexp = regexp.replaceAll(xRe, '(?:$anyIdentifier)');
     final spaceRe = new RegExp('\\s+');
     regexp = regexp.replaceAll(spaceRe, '(?:\\s*)');
     if (shouldMatch) {
       Expect.isTrue(new RegExp(regexp).hasMatch(generated));
     } else {
       Expect.isFalse(new RegExp(regexp).hasMatch(generated));
     }
   });
 }