Optimize dartium dart:html bindings so real world application performance is acceptable. Improves d…

tools/dom/src/dartium_KeyEvent.dart

Index: tools/dom/src/dartium_KeyEvent.dart
diff --git a/tools/dom/src/dartium_KeyEvent.dart b/tools/dom/src/dartium_KeyEvent.dart
index 9997689c6d65d5b7992b8b92821f380232b8f10f..b0a494a6db074336205060ff240119844253edd6 100644
--- a/tools/dom/src/dartium_KeyEvent.dart
+++ b/tools/dom/src/dartium_KeyEvent.dart
@@ -30,13 +30,7 @@ part of html;
 @Experimental()
 class KeyEvent extends _WrappedEvent implements KeyboardEvent {
   /** Needed because KeyboardEvent is implements.
-   *  TODO(terry): Consider making blink_jsObject private (add underscore) for
-   *               all blink_jsObject.  Then needed private wrap/unwrap_jso
-   *               functions that delegate to a public wrap/unwrap_jso.
    */
-  @Deprecated("Internal Use Only")
-  js.JsObject blink_jsObject;
-
   /** The parent KeyboardEvent that this KeyEvent is wrapping and "fixing". */
   KeyboardEvent _parent;