Move parser and token related libraries into their own subfolder.

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 73 matching lines @@
     JavaScriptBackend;
 import 'library_loader.dart' show
     LibraryLoader,
     LibraryLoaderTask,
     LoadedLibraries;
 import 'mirrors_used.dart' show
     MirrorUsageAnalyzerTask;
 import 'null_compiler_output.dart' show
     NullCompilerOutput,
     NullSink;
+import 'parser/diet_parser_task.dart' show
+    DietParserTask;
+import 'parser/parser_task.dart' show
+    DietParserTask,
+    ParserTask;
 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/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,
-    EOF_TOKEN,
-    StringToken,
-    Token,
-    TokenPair;
 import 'serialization/task.dart' show
     SerializationTask;
 import 'script.dart' show
     Script;
 import 'ssa/ssa.dart' show
     HInstruction;
 import 'tracer.dart' show
     Tracer;
+import 'tokens/token.dart' show
+    COMMENT_TOKEN,
+    EOF_TOKEN,
+    StringToken,
+    Token,
+    TokenPair;
+import 'tokens/token_map.dart' show
+    TokenMap;
 import 'tree/tree.dart' show
     Node;
 import 'typechecker.dart' show
     TypeCheckerTask;
 import 'types/types.dart' as ti;
 import 'universe/universe.dart' show
     CallStructure,
     Selector,
     Universe;
 import 'util/util.dart' show
@@ skipping 1647 matching lines @@
 
   @override
   InterfaceType streamType([DartType elementType]) {
     InterfaceType type = streamClass.computeType(compiler);
     if (elementType == null) {
       return streamClass.rawType;
     }
     return type.createInstantiation([elementType]);
   }
 }