Make ui::test::EventGenerator work with PointerEvents in mash

ui/events/test/event_generator.h

Index: ui/events/test/event_generator.h
diff --git a/ui/events/test/event_generator.h b/ui/events/test/event_generator.h
index 8d40e577ca47ddb829024a52486f4f44fcb146d2..649027cd6f7cc7c09b47253d27248a36c1983625 100644
--- a/ui/events/test/event_generator.h
+++ b/ui/events/test/event_generator.h
@@ -69,11 +69,16 @@ class EventGeneratorDelegate {
   virtual void ConvertPointFromHost(const EventTarget* hosted_target,
                                     gfx::Point* point) const = 0;
 
-  // Detemines whether the input method should be the first to handle key events
-  // before dispathcing to Views. If it does, the given |event| will be
+  // Determines if the input method should be the first to handle key events
+  // before dispatching to Views. If it does, the given |event| will be
   // dispatched and processed by the input method from the host of |target|.
   virtual void DispatchKeyEventToIME(EventTarget* target,
                                      ui::KeyEvent* event) = 0;
+
+  // Offers the event to pointer watchers on systems that provide them.
+  // Does not consume the event (pointer watchers cannot consume events).
+  virtual void DispatchEventToPointerWatchers(EventTarget* target,
+                                              const PointerEvent& event) {}
 };
 
 // ui::test::EventGenerator is a tool that generates and dispatches events.
@@ -432,6 +437,10 @@ class EventGenerator {
   void DispatchNextPendingEvent();
   void DoDispatchEvent(Event* event, bool async);
 
+  // Offers event to pointer watchers (via delegate) if the event is a mouse or
+  // touch event.
+  void MaybeDispatchToPointerWatchers(Event* event);

[sadrul, 2017/03/17 00:08:36]

I think MaybeDispatchToPointerWatchers() never mutates |event|, right? Can this
a const& instead of a pointer?

[James Cook, 2017/03/17 02:43:16]

Done.

+
   const EventGeneratorDelegate* delegate() const;
   EventGeneratorDelegate* delegate();