Don't pass touches to gesture recognizer for async acks.

ui/aura/window_event_dispatcher.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/aura/window_event_dispatcher.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 139 matching lines @@
 }
 
 DispatchDetails WindowEventDispatcher::DispatchMouseExitAtPoint(
     Window* window,
     const gfx::Point& point) {
   ui::MouseEvent event(ui::ET_MOUSE_EXITED, point, point, ui::EF_NONE,
                        ui::EF_NONE);
   return DispatchMouseEnterOrExit(window, event, ui::ET_MOUSE_EXITED);
 }
 
-void WindowEventDispatcher::ProcessedTouchEvent(ui::TouchEvent* event,
-                                                Window* window,
+void WindowEventDispatcher::ProcessedTouchEvent(Window* window,
                                                 ui::EventResult result) {
-  // Once we've fully migrated to the eager gesture detector, we won't need to
-  // pass an event here.
   scoped_ptr<ui::GestureRecognizer::Gestures> gestures(
-      ui::GestureRecognizer::Get()->AckAsyncTouchEvent(
-          *event, result, window));
+      ui::GestureRecognizer::Get()->AckAsyncTouchEvent(result, window));
   DispatchDetails details = ProcessGestures(gestures.get());
   if (details.dispatcher_destroyed)
     return;
 }
 
 void WindowEventDispatcher::HoldPointerMoves() {
   if (!move_hold_count_)
     held_event_factory_.InvalidateWeakPtrs();
   ++move_hold_count_;
   TRACE_EVENT_ASYNC_BEGIN0("ui", "WindowEventDispatcher::HoldPointerMoves",
@@ skipping 718 matching lines @@
   }
 
   // This flag is set depending on the gestures recognized in the call above,
   // and needs to propagate with the forwarded event.
   event->set_may_cause_scrolling(orig_event.may_cause_scrolling());
 
   PreDispatchLocatedEvent(target, event);
 }
 
 }  // namespace aura