Fix for CheckBox not registering ClickEvents under the new event 
bubbling code, long term, we need a more general solution.
Review by:jgw

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@801 8db76d5a-ed1c-0410-87a9-c151d255dfc7
diff --git a/user/src/com/google/gwt/user/client/ui/CheckBox.java b/user/src/com/google/gwt/user/client/ui/CheckBox.java
index 133e7f5..de9a391 100644
--- a/user/src/com/google/gwt/user/client/ui/CheckBox.java
+++ b/user/src/com/google/gwt/user/client/ui/CheckBox.java
@@ -78,7 +78,6 @@
 
     // Add focus event to actual input widget. Required by Opera and old
     // Mozilla.
-    unsinkEvents(Event.FOCUSEVENTS | Event.ONCLICK);
     DOM.sinkEvents(inputElem, Event.FOCUSEVENTS | Event.ONCLICK
         | DOM.getEventsSunk(inputElem));
 
@@ -116,6 +115,16 @@
     return !DOM.getBooleanAttribute(inputElem, "disabled");
   }
 
+  public void onBrowserEvent(Event event) {
+    // Block the events from the label as they are automatically delegated to
+    // the event.
+    if (DOM.eventGetTarget(event).equals(labelElem)) {
+      return;
+    } else {
+      super.onBrowserEvent(event);
+    }
+  }
+
   public void setAccessKey(char key) {
     DOM.setAttribute(inputElem, "accessKey", "" + key);
   }