Bookkeep the pointer event listeners added to page

third_party/WebKit/Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 1590 matching lines @@
 }
 
 unsigned Internals::touchEndOrCancelEventHandlerCount(Document* document) {
   DCHECK(document);
   return EventHandlerCount(
              *document, EventHandlerRegistry::kTouchEndOrCancelEventBlocking) +
          EventHandlerCount(*document,
                            EventHandlerRegistry::kTouchEndOrCancelEventPassive);
 }
 
+unsigned Internals::pointerEventHandlerCount(Document* document) {

[dtapuska, 2017/06/01 16:03:01]

This should be able to be const.

[eirage, 2017/06/01 19:59:24]

Done.

+  DCHECK(document);
+  return EventHandlerCount(*document, EventHandlerRegistry::kPointerEvent);
+}
+
 static PaintLayer* FindLayerForGraphicsLayer(PaintLayer* search_root,
                                              GraphicsLayer* graphics_layer,
                                              IntSize* layer_offset,
                                              String* layer_type) {
   *layer_offset = IntSize();
   if (search_root->HasCompositedLayerMapping() &&
       graphics_layer ==
           search_root->GetCompositedLayerMapping()->MainGraphicsLayer()) {
     // If the |graphicsLayer| sets the scrollingContent layer as its
     // scroll parent, consider it belongs to the scrolling layer and
@@ skipping 1672 matching lines @@
 
 void Internals::crash() {
   CHECK(false) << "Intentional crash";
 }
 
 void Internals::setIsLowEndDevice(bool is_low_end_device) {
   MemoryCoordinator::SetIsLowEndDeviceForTesting(is_low_end_device);
 }
 
 }  // namespace blink