Align source mirrors with runtime mirrors.

tests/compiler/dart2js/mirrors_exports_test.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.
 
 import 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
 import 'dart:async';
 import 'memory_compiler.dart';
-import '../../../sdk/lib/_internal/compiler/implementation/mirrors/mirrors.dart';
+import '../../../sdk/lib/_internal/compiler/implementation/mirrors/source_mirrors.dart';
 
 const SOURCE_FILES = const {
 'main.dart': '''
 import 'a.dart' show A1, A2;
 import 'b.dart' as b hide B1;
 export 'a.dart' show A2 hide A3, A1;
 export 'b.dart' hide B1, B2 show B3;
 import 'dart:core' as core;
 
 main() {}
 ''',
 'a.dart': '''
 class A1 {}
 class A2 {}
 class A3 {}
 ''',
 'b.dart': '''
 class B1 {}
 class B2 {}
 class B3 {}
 '''
 };
 
 void main() {
   asyncTest(() => mirrorSystemFor(SOURCE_FILES).then((MirrorSystem mirrors) {
-    LibraryMirror mainLibrary =
+    LibrarySourceMirror mainLibrary =
         mirrors.libraries[Uri.parse('memory:main.dart')];
     Expect.isNotNull(mainLibrary);
 
-    LibraryMirror aLibrary =
+    LibrarySourceMirror aLibrary =
         mirrors.libraries[Uri.parse('memory:a.dart')];
     Expect.isNotNull(aLibrary);
 
-    LibraryMirror bLibrary =
+    LibrarySourceMirror bLibrary =
         mirrors.libraries[Uri.parse('memory:b.dart')];
     Expect.isNotNull(bLibrary);
 
-    LibraryMirror coreLibrary =
+    LibrarySourceMirror coreLibrary =
         mirrors.libraries[Uri.parse('dart:core')];
     Expect.isNotNull(coreLibrary);
 
     var dependencies = mainLibrary.libraryDependencies;
     Expect.isNotNull(dependencies);
     Expect.equals(5, dependencies.length);
 
     // import 'a.dart' show A1, A2;
     var dependency = dependencies[0];
     Expect.isNotNull(dependency);
@@ skipping 89 matching lines @@
     Expect.isFalse(dependency.isExport);
     Expect.equals(mainLibrary, dependency.sourceLibrary);
     Expect.equals(coreLibrary, dependency.targetLibrary);
     Expect.equals('core', dependency.prefix);
 
     combinators = dependency.combinators;
     Expect.isNotNull(combinators);
     Expect.equals(0, combinators.length);
   }));
 }