NOT FOR SUBMIT: use counters for jdm@

third_party/WebKit/Source/core/events/MouseEvent.idl

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 14 matching lines @@
 ] interface MouseEvent : UIEvent {
     readonly attribute double           screenX;
     readonly attribute double           screenY;
     readonly attribute double           clientX;
     readonly attribute double           clientY;
     readonly attribute boolean          ctrlKey;
     readonly attribute boolean          shiftKey;
     readonly attribute boolean          altKey;
     readonly attribute boolean          metaKey;
     readonly attribute short            button;
-    readonly attribute unsigned short   buttons;
+    [Measure] readonly attribute unsigned short   buttons;
     readonly attribute EventTarget?     relatedTarget;
-    boolean getModifierState(DOMString keyArg);
+    [Measure] boolean getModifierState(DOMString keyArg);
 
     // https://w3c.github.io/uievents/#idl-interface-MouseEvent-initializers
     // TODO(foolip): None of the initMouseEvent() arguments should be optional.
     [CallWith=ScriptState, Measure] void initMouseEvent([Default=Undefined] optional DOMString type,
                                                         [Default=Undefined] optional boolean bubbles,
                                                         [Default=Undefined] optional boolean cancelable,
                                                         [Default=Undefined] optional Window? view,
                                                         [Default=Undefined] optional long detail,
                                                         [Default=Undefined] optional long screenX,
                                                         [Default=Undefined] optional long screenY,
                                                         [Default=Undefined] optional long clientX,
                                                         [Default=Undefined] optional long clientY,
                                                         [Default=Undefined] optional boolean ctrlKey,
                                                         [Default=Undefined] optional boolean altKey,
                                                         [Default=Undefined] optional boolean shiftKey,
                                                         [Default=Undefined] optional boolean metaKey,
                                                         [Default=Undefined] optional unsigned short button,
                                                         [Default=Undefined] optional EventTarget? relatedTarget);
 
-    readonly attribute double pageX;
-    readonly attribute double pageY;
+    [Measure] readonly attribute double pageX;
+    [Measure] readonly attribute double pageY;
     [MeasureAs=MouseEventX] readonly attribute double x;
     [MeasureAs=MouseEventY] readonly attribute double y;
     [MeasureAs=MouseEventOffsetX] readonly attribute double offsetX;
     [MeasureAs=MouseEventOffsetY] readonly attribute double offsetY;
 
     // Pointer Lock
     // https://w3c.github.io/pointerlock/#extensions-to-the-mouseevent-interface
     [MeasureAs=MouseEventMovementX] readonly attribute long movementX;
     [MeasureAs=MouseEventMovementY] readonly attribute long movementY;
 
     // Canvas Hit Regions
     // https://html.spec.whatwg.org/multipage/scripting.html#MouseEvent-partial
-    [RuntimeEnabled=ExperimentalCanvasFeatures] readonly attribute DOMString? region;
+    [RuntimeEnabled=ExperimentalCanvasFeatures, Measure] readonly attribute DOMString? region;
 
     // Non-standard
     [MeasureAs=MouseEventFromElement] readonly attribute Node fromElement;
     [MeasureAs=MouseEventToElement] readonly attribute Node toElement;
     [MeasureAs=MouseEventWhich] readonly attribute long which;
     [Measure] readonly attribute long layerX;
     [Measure] readonly attribute long layerY;
 };