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

tools/dom/templates/html/impl/impl_WheelEvent.darttemplate

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
 
 $(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 
   factory WheelEvent(String type,
       {Window view, int deltaX: 0, int deltaY: 0,
       int detail: 0, int screenX: 0, int screenY: 0, int clientX: 0,
       int clientY: 0, int button: 0, bool canBubble: true,
       bool cancelable: true, bool ctrlKey: false, bool altKey: false,
       bool shiftKey: false, bool metaKey: false, EventTarget relatedTarget}) {
 
     if (view == null) {
       view = window;
     }
     var eventType = 'WheelEvent';
     if (Device.isFirefox) {
       eventType = 'MouseScrollEvents';
     }
-    final event = document.$dom_createEvent(eventType);
+    final event = document._createEvent(eventType);
 $if DART2JS
     // If polyfilling, then flip these because we'll flip them back to match
     // the W3C standard:
     // http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html#events-WheelEvent-deltaY
     if (JS('bool', '#.deltaY === undefined', event)) {
       deltaX = -deltaX;
       deltaY = -deltaY;
     }
     if (event._hasInitWheelEvent) {
       var modifiers = [];
@@ skipping 30 matching lines @@
           screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey,
           metaKey, button, relatedTarget, axis);
     } else {
 $else
     // Dartium always needs these flipped because we're essentially always
     // polyfilling (see similar dart2js code as well)
     deltaX = -deltaX;
     deltaY = -deltaY;
 $endif
       // Fallthrough for Dartium.
-      event.$dom_initMouseEvent(type, canBubble, cancelable, view, detail,
+      event._initMouseEvent(type, canBubble, cancelable, view, detail,
           screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey,
           metaKey, button, relatedTarget);
-      event.$dom_initWebKitWheelEvent(deltaX,
+      event._initWebKitWheelEvent(deltaX,
           deltaY ~/ 120, // Chrome does an auto-convert to pixels.
           view, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey,
           metaKey);
 $if DART2JS
     }
 $endif
 
     return event;
   }
 
@@ skipping 149 matching lines @@
    * [deltaMode].
    *
    * See also:
    *
    * * [WheelEvent.deltaY](http://dev.w3.org/2006/webapi/DOM-Level-3-Events/html/DOM3-Events.html#events-WheelEvent-deltaY) from the W3C.
    */
   @DomName('WheelEvent.deltaY')
   num get deltaY => -_wheelDeltaY;
 $endif
 }