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

tools/dom/src/dart2js_KeyEvent.dart

Index: tools/dom/src/dart2js_KeyEvent.dart
diff --git a/tools/dom/src/dart2js_KeyEvent.dart b/tools/dom/src/dart2js_KeyEvent.dart
index 15a715359f54eea78ae66bffb41c6cc2326b0544..303d4457e60017571e47d48df2365a7f2ce52477 100644
--- a/tools/dom/src/dart2js_KeyEvent.dart
+++ b/tools/dom/src/dart2js_KeyEvent.dart
@@ -84,18 +84,18 @@ class KeyEvent extends _WrappedEvent implements KeyboardEvent {
   /** 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 => JS('String', '#.keyIdentifier', _parent);
 
-  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) {