Fix VariableDefinitions.endToken for formal parameters.

sdk/lib/_internal/compiler/implementation/scanner/parser.dart

Index: sdk/lib/_internal/compiler/implementation/scanner/parser.dart
diff --git a/sdk/lib/_internal/compiler/implementation/scanner/parser.dart b/sdk/lib/_internal/compiler/implementation/scanner/parser.dart
index 64f712f45eaa636998c1fbc7faabd5387c6d36ef..ed2ddfee9003ba855ea68b667398872bc552cdd1 100644
--- a/sdk/lib/_internal/compiler/implementation/scanner/parser.dart
+++ b/sdk/lib/_internal/compiler/implementation/scanner/parser.dart
@@ -325,7 +325,7 @@ class Parser {
       token = parseExpression(token.next);
       listener.handleValuedFormalParameter(equal, token);
     }
-    listener.endFormalParameter(token, thisKeyword);
+    listener.endFormalParameter(thisKeyword);
     return token;
   }