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 91aa70be1edb080292ed7ddb825dbd7bfe44272c..40eae363c8a8d3e037ce65a85696031197901f16 100644
--- a/sdk/lib/_internal/compiler/implementation/scanner/parser.dart
+++ b/sdk/lib/_internal/compiler/implementation/scanner/parser.dart
@@ -361,7 +361,7 @@ class Parser {
       token = parseExpression(token.next);
       listener.handleValuedFormalParameter(equal, token);
     }
-    listener.endFormalParameter(token, thisKeyword);
+    listener.endFormalParameter(thisKeyword);
     return token;
   }