Update partial parser and scanner to be able to skip expressions like "new Map<S, T>()".

dart/lib/compiler/implementation/scanner/partial_parser.dart

 // Copyright (c) 2011, 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.
 
 class PartialParser extends Parser {
   PartialParser(Listener listener) : super(listener);
 
   Token parseClassBody(Token token) => skipClassBody(token);
 
   Token fullParseClassBody(Token token) => super.parseClassBody(token);
@@ skipping 36 matching lines @@
           token = (begin.endGroup !== null) ? begin.endGroup : token;
           token = token.next;
           if (token.stringValue === '{') {
             begin = token;
             token = (begin.endGroup !== null) ? begin.endGroup : token;
             token = token.next;
           }
           continue;
         }
       }
-      if (!mayParseFunctionExpressions && value === '{')
-        return token;
-      if ((value !== '<') && (token is BeginGroupToken)) {
+      if (!mayParseFunctionExpressions && value === '{') return token;
+      if (token is BeginGroupToken) {
         BeginGroupToken begin = token;
         token = (begin.endGroup !== null) ? begin.endGroup : token;
       }
       token = token.next;
     }
   }
 
   Token skipClassBody(Token token) {
     if (!optional('{', token)) {
       return listener.expectedClassBodyToSkip(token);
@@ skipping 31 matching lines @@
         return token;
       }
       return listener.unexpected(token);
     }
     BeginGroupToken beginGroupToken = token;
     Token endToken = beginGroupToken.endGroup;
     listener.endFormalParameters(0, token, endToken);
     return endToken.next;
   }
 }