Fix up DOM keyboardEvent constructor for dartium.

sdk/lib/html/templates/html/dartium/impl_KeyboardEvent.darttemplate

Index: sdk/lib/html/templates/html/dartium/impl_KeyboardEvent.darttemplate
diff --git a/sdk/lib/html/templates/html/dartium/impl_KeyboardEvent.darttemplate b/sdk/lib/html/templates/html/dartium/impl_KeyboardEvent.darttemplate
index cc66b4f3a6e121169a5730d7b5800455381d16ef..6e07fa9d2fa26eb829b30095f6a7e19c0b385af4 100644
--- a/sdk/lib/html/templates/html/dartium/impl_KeyboardEvent.darttemplate
+++ b/sdk/lib/html/templates/html/dartium/impl_KeyboardEvent.darttemplate
@@ -17,12 +17,6 @@ class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
     return e;
   }
 
-  /** @domName KeyboardEvent.initKeyboardEvent */
-  void $dom_initKeyboardEvent(String type, bool canBubble, bool cancelable,
-      LocalWindow view, String keyIdentifier, int keyLocation, bool ctrlKey,
-      bool altKey, bool shiftKey, bool metaKey,
-      bool altGraphKey) native "KeyboardEvent_initKeyboardEvent_Callback";
- 
   /** @domName KeyboardEvent.keyCode */
   int get keyCode => $dom_keyCode;