Get rid of a lot of () for getters.

lib/html/src/UIEvent.dart

Index: lib/html/src/UIEvent.dart
diff --git a/lib/html/src/UIEvent.dart b/lib/html/src/UIEvent.dart
index 8aa8636359ea9549eef13594ab0f01cf0dd21e9e..64806e39a8d37bd71a3bb96666c4f453eb7a1508 100644
--- a/lib/html/src/UIEvent.dart
+++ b/lib/html/src/UIEvent.dart
@@ -7,21 +7,21 @@ interface UIEvent extends Event default UIEventWrappingImplementation {
   UIEvent(String type, Window view, int detail, [bool canBubble,
       bool cancelable]);
 
-  int get charCode();
+  int get charCode;
 
-  int get detail();
+  int get detail;
 
-  int get keyCode();
+  int get keyCode;
 
-  int get layerX();
+  int get layerX;
 
-  int get layerY();
+  int get layerY;
 
-  int get pageX();
+  int get pageX;
 
-  int get pageY();
+  int get pageY;
 
-  Window get view();
+  Window get view;
 
-  int get which();
+  int get which;
 }