Change the error handling in dart:io

runtime/bin/http.dart

Index: runtime/bin/http.dart
diff --git a/runtime/bin/http.dart b/runtime/bin/http.dart
index b44f380470b5abf0d8a284845ffa92353257437e..dfd96a116cd3fc232800f10b5e96d3d7e74672cb 100644
--- a/runtime/bin/http.dart
+++ b/runtime/bin/http.dart
@@ -117,7 +117,7 @@ interface HttpServer default _HttpServer {
   /**
    * Sets the error handler that is called when a connection error occurs.
    */
-  void set onError(void callback(Exception e));
+  void set onError(void callback(e));
 }
 
 
@@ -477,7 +477,7 @@ interface HttpClientConnection {
    * Sets the handler that gets called if an error occurs while
    * connecting or processing the HTTP request.
    */
-  void set onError(void callback(Exception e));
+  void set onError(void callback(e));
 }