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

tools/dom/templates/html/dart2js/impl_MouseEvent.darttemplate

Index: tools/dom/templates/html/dart2js/impl_MouseEvent.darttemplate
diff --git a/tools/dom/templates/html/dart2js/impl_MouseEvent.darttemplate b/tools/dom/templates/html/dart2js/impl_MouseEvent.darttemplate
index 51d1c425e9d9ac41367bc7ec1599ec00b134e168..d48febb6e90dc77f0406739775d65c0a13a3dd99 100644
--- a/tools/dom/templates/html/dart2js/impl_MouseEvent.darttemplate
+++ b/tools/dom/templates/html/dart2js/impl_MouseEvent.darttemplate
@@ -14,8 +14,8 @@ $(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
     if (view == null) {
       view = window;
     }
-    var event = document.$dom_createEvent('MouseEvent');
-    event.$dom_initMouseEvent(type, canBubble, cancelable, view, detail,
+    var event = document._createEvent('MouseEvent');
+    event._initMouseEvent(type, canBubble, cancelable, view, detail,
         screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey,
         button, relatedTarget);
     return event;
@@ -41,14 +41,14 @@ $!MEMBERS
 
   @DomName('MouseEvent.clientX')
   @DomName('MouseEvent.clientY')
-  Point get client => new Point($dom_clientX, $dom_clientY);
+  Point get client => new Point(_clientX, _clientY);
 
   @DomName('MouseEvent.movementX')
   @DomName('MouseEvent.movementY')
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental()
-  Point get movement => new Point($dom_webkitMovementX, $dom_webkitMovementY);
+  Point get movement => new Point(_webkitMovementX, _webkitMovementY);
 
   /**
    * The coordinates of the mouse pointer in target node coordinates.
@@ -75,5 +75,5 @@ $!MEMBERS
 
   @DomName('MouseEvent.screenX')
   @DomName('MouseEvent.screenY')
-  Point get screen => new Point($dom_screenX, $dom_screenY);
+  Point get screen => new Point(_screenX, _screenY);
 }