Split scannerlib.dart into several libraries.

pkg/compiler/lib/src/compiler.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.
 
 library dart2js.compiler_base;
 
 import 'dart:async' show
     EventSink,
     Future;
 
@@ skipping 83 matching lines @@
 import 'patch_parser.dart' show
     PatchParserTask;
 import 'resolution/registry.dart' show
     ResolutionRegistry;
 import 'resolution/resolution.dart' show
     ResolverTask;
 import 'resolution/tree_elements.dart' show
     TreeElementMapping;
 import 'scanner/token_map.dart' show
     TokenMap;
-import 'scanner/scannerlib.dart' show
+import 'scanner/diet_parser_task.dart' show
+    DietParserTask;
+import 'scanner/scanner_task.dart' show
+    ScannerTask;
+import 'scanner/parser_task.dart' show
+    DietParserTask,
+    ParserTask;
+import 'scanner/token.dart' show
     COMMENT_TOKEN,
-    DietParserTask,
     EOF_TOKEN,
-    ParserTask,
-    ScannerTask,
     StringToken,
     Token,
     TokenPair;
 import 'serialization/task.dart' show
     SerializationTask;
 import 'script.dart' show
     Script;
 import 'ssa/ssa.dart' show
     HInstruction;
 import 'tracer.dart' show
@@ skipping 1658 matching lines @@
 
   @override
   InterfaceType streamType([DartType elementType]) {
     InterfaceType type = streamClass.computeType(compiler);
     if (elementType == null) {
       return streamClass.rawType;
     }
     return type.createInstantiation([elementType]);
   }
 }