Parse assert statements with Fasta.

pkg/front_end/lib/src/fasta/parser/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.
 
 library fasta.parser.parser;
 
 import '../scanner.dart' show ErrorToken;
 
 import '../scanner/recover.dart' show closeBraceFor, skipToEof;
 
@@ skipping 3489 matching lines @@
       hasTarget = true;
     }
     listener.handleBreakStatement(hasTarget, breakKeyword, token);
     return expectSemicolon(token);
   }
 
   Token parseAssertStatement(Token token) {
     Token assertKeyword = token;
     Token commaToken = null;
     token = expect('assert', token);
+    Token leftParenthesis = token;
     token = expect('(', token);
     bool old = mayParseFunctionExpressions;
     mayParseFunctionExpressions = true;
     token = parseExpression(token);
     if (optional(',', token)) {
       commaToken = token;
       token = token.next;
       token = parseExpression(token);
     }
+    Token rightParenthesis = token;
     token = expect(')', token);
     mayParseFunctionExpressions = old;
-    listener.handleAssertStatement(assertKeyword, commaToken, token);
+    listener.handleAssertStatement(
+        assertKeyword, leftParenthesis, commaToken, rightParenthesis, token);
     return expectSemicolon(token);
   }
 
   Token parseContinueStatement(Token token) {
     assert(optional('continue', token));
     Token continueKeyword = token;
     token = token.next;
     bool hasTarget = false;
     if (token.isIdentifier()) {
       token = parseIdentifier(token, IdentifierContext.labelReference);
@@ skipping 65 matching lines @@
         break;
     }
     if (isRecoverable) {
       listener.handleRecoverableError(token, kind, arguments);
       return null;
     } else {
       return listener.handleUnrecoverableError(token, kind, arguments);
     }
   }
 }