Making almost all dom_ methods private. Exceptions will be addressed in a later CL.

tools/dom/src/dartium_KeyEvent.dart

 /**
  * A custom KeyboardEvent that attempts to eliminate cross-browser
  * inconsistencies, and also provide both keyCode and charCode information
  * for all key events (when such information can be determined).
  *
  * KeyEvent tries to provide a higher level, more polished keyboard event
  * information on top of the "raw" [KeyboardEvent].
  *
  * This class is very much a work in progress, and we'd love to get information
  * on how we can make this class work with as many international keyboards as
@@ skipping 66 matching lines @@
    * KeyLocation.NUMPAD, KeyLocation.MOBILE, KeyLocation.JOYSTICK).
    */
   int get keyLocation => _parent.keyLocation;
   Point get layer => _parent.layer;
   /** True if the Meta (or Mac command) key is pressed during this event. */
   bool get metaKey => _parent.metaKey;
   Point get page => _parent.page;
   /** True if the shift key was pressed during this event. */
   bool get shiftKey => _parent.shiftKey;
   Window get view => _parent.view;
-  void $dom_initUIEvent(String type, bool canBubble, bool cancelable,
+  void _initUIEvent(String type, bool canBubble, bool cancelable,
       Window view, int detail) {
     throw new UnsupportedError("Cannot initialize a UI Event from a KeyEvent.");
   }
-  String get _shadowKeyIdentifier => _parent.$dom_keyIdentifier;
+  String get _shadowKeyIdentifier => _parent._keyIdentifier;
 
-  int get $dom_charCode => charCode;
-  int get $dom_keyCode => keyCode;
-  String get $dom_keyIdentifier {
+  int get _charCode => charCode;
+  int get _keyCode => keyCode;
+  String get _keyIdentifier {
     throw new UnsupportedError("keyIdentifier is unsupported.");
   }
-  void $dom_initKeyboardEvent(String type, bool canBubble, bool cancelable,
+  void _initKeyboardEvent(String type, bool canBubble, bool cancelable,
       Window view, String keyIdentifier, int keyLocation, bool ctrlKey,
       bool altKey, bool shiftKey, bool metaKey,
       bool altGraphKey) {
     throw new UnsupportedError(
         "Cannot initialize a KeyboardEvent from a KeyEvent.");
   }
 }