Bookkeep the pointer event listeners added to page

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

Index: third_party/WebKit/Source/core/testing/Internals.h
diff --git a/third_party/WebKit/Source/core/testing/Internals.h b/third_party/WebKit/Source/core/testing/Internals.h
index 593a402928cee21be11069b5d65927c8e9bf2a08..dce498b1b02a268eb757ec7ff1a4e4d78b1985c2 100644
--- a/third_party/WebKit/Source/core/testing/Internals.h
+++ b/third_party/WebKit/Source/core/testing/Internals.h
@@ -261,10 +261,12 @@ class Internals final : public GarbageCollected<Internals>,
   unsigned mediaKeysCount();
   unsigned mediaKeySessionCount();
   unsigned suspendableObjectCount(Document*);
-  unsigned wheelEventHandlerCount(Document*);
-  unsigned scrollEventHandlerCount(Document*);
-  unsigned touchStartOrMoveEventHandlerCount(Document*);
-  unsigned touchEndOrCancelEventHandlerCount(Document*);
+  unsigned wheelEventHandlerCount(Document*) const;
+  unsigned scrollEventHandlerCount(Document*) const;
+  unsigned touchStartOrMoveEventHandlerCount(Document*) const;
+  unsigned touchEndOrCancelEventHandlerCount(Document*) const;
+  unsigned pointerEventHandlerCount(Document*) const;
+
   LayerRectList* touchEventTargetLayerRects(Document*, ExceptionState&);
 
   bool executeCommand(Document*,