Split scannerlib.dart into several libraries.

pkg/dart2js_incremental/lib/library_updater.dart

Index: pkg/dart2js_incremental/lib/library_updater.dart
diff --git a/pkg/dart2js_incremental/lib/library_updater.dart b/pkg/dart2js_incremental/lib/library_updater.dart
index 6120e379206cbab71cb8c3431ca2c4aa42a74bf5..ed3a6df8d281f959f521eb9def042b0261002ae5 100644
--- a/pkg/dart2js_incremental/lib/library_updater.dart
+++ b/pkg/dart2js_incremental/lib/library_updater.dart
@@ -27,16 +27,24 @@ import 'package:compiler/src/elements/elements.dart' show
 import 'package:compiler/src/enqueue.dart' show
     EnqueueTask;
 
-import 'package:compiler/src/scanner/scannerlib.dart' show
-    EOF_TOKEN,
+import 'package:compiler/src/scanner/class_element_parser.dart' show
+    PartialClassElement;
+
+import 'package:compiler/src/scanner/listener.dart' show
     Listener,
     NodeListener,
-    Parser,
-    PartialClassElement,
     PartialElement,
     PartialFieldList,
-    PartialFunctionElement,
-    Scanner,
+    PartialFunctionElement;
+
+import 'package:compiler/src/scanner/parser.dart' show
+    Parser;
+
+import 'package:compiler/src/scanner/scanner.dart' show
+    Scanner;
+
+import 'package:compiler/src/scanner/token.dart' show
+    EOF_TOKEN,
     Token;
 
 import 'package:compiler/src/script.dart' show