Added 'dynamic' keyword, so that 'Dynamic' can be deprecated.

lib/compiler/implementation/scanner/parser.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.
 
 /**
  * An event generating parser of Dart programs. This parser expects
  * all tokens in a linked list (aka a token stream).
  *
  * The class [Scanner] is used to generate a token stream. See the
  * file scanner.dart.
@@ skipping 304 matching lines @@
     listener.handleNoType(token);
     return token;
   }
 
   bool isValidTypeReference(Token token) {
     final kind = token.kind;
     if (kind === IDENTIFIER_TOKEN) return true;
     if (kind === KEYWORD_TOKEN) {
       Keyword keyword = token.value;
       String value = keyword.stringValue;
-      return keyword.isPseudo || (value === 'Dynamic') || (value === 'void');
+      // TODO(aprelev@gmail.com): Remove deprecated Dynamic keyword support.
+      return keyword.isPseudo
+          || (value === 'dynamic')
+          || (value === 'Dynamic')
+          || (value === 'void');
     }
     return false;
   }
 
   Token parseDefaultClauseOpt(Token token) {
     if (isDefaultKeyword(token)) {
       // TODO(ahe): Remove support for 'factory' in this position.
       Token defaultKeyword = token;
       listener.beginDefaultClause(defaultKeyword);
       token = parseIdentifier(token.next);
@@ skipping 1709 matching lines @@
     }
     listener.handleContinueStatement(hasTarget, continueKeyword, token);
     return expectSemicolon(token);
   }
 
   Token parseEmptyStatement(Token token) {
     listener.handleEmptyStatement(token);
     return expectSemicolon(token);
   }
 }