Revert "Parse new library syntax."

dart/lib/compiler/implementation/elements/elements.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('elements');
 
 #import('dart:uri');
 
 #import('../tree/tree.dart');
 #import('../scanner/scannerlib.dart');
@@ skipping 464 matching lines @@
         super(compilationUnit.name,
               ElementKind.COMPILATION_UNIT_OVERRIDE,
               enclosing);
 }
 
 class LibraryElement extends ScopeContainerElement {
   final Uri uri;
   CompilationUnitElement entryCompilationUnit;
   Link<CompilationUnitElement> compilationUnits =
       const EmptyLink<CompilationUnitElement>();
-  Link<LibraryTag> tags = const EmptyLink<LibraryTag>();
-  LibraryTag libraryTag;
+  Link<ScriptTag> tags = const EmptyLink<ScriptTag>();
+  ScriptTag libraryTag;
   bool canUseNative = false;
   LibraryElement patch = null;
 
   LibraryElement(Script script, [Uri uri])
     : this.uri = ((uri === null) ? script.uri : uri),
       super(new SourceString(script.name), ElementKind.LIBRARY, null) {
     entryCompilationUnit = new CompilationUnitElement(script, this);
   }
 
 
   bool get isPatched => patch !== null;
 
   void addCompilationUnit(CompilationUnitElement element) {
     compilationUnits = compilationUnits.prepend(element);
   }
 
-  void addTag(LibraryTag tag, DiagnosticListener listener) {
+  void addTag(ScriptTag tag, DiagnosticListener listener) {
     tags = tags.prepend(tag);
   }
 
   /** Look up a top-level element in this library. The element could
     * potentially have been imported from another library. Returns
     * null if no such element exist. */
   Element find(SourceString elementName) {
     return localScope[elementName];
   }
 
@@ skipping 1177 matching lines @@
 
   MetadataAnnotation ensureResolved(Compiler compiler) {
     if (resolutionState == STATE_NOT_STARTED) {
       compiler.resolver.resolveMetadataAnnotation(this);
     }
     return this;
   }
 
   String toString() => 'MetadataAnnotation($value, $resolutionState)';
 }