Don't send touch events to windows like menus when the touch occurs outside the menu bounds.

ui/aura/window_event_dispatcher.h

 // 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.
 
 #ifndef UI_AURA_WINDOW_EVENT_DISPATCHER_H_
 #define UI_AURA_WINDOW_EVENT_DISPATCHER_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 53 matching lines @@
  public:
   explicit WindowEventDispatcher(WindowTreeHost* host);
   ~WindowEventDispatcher() override;
 
   void set_transform_events(bool value) { transform_events_ = value; }
 
   Window* mouse_pressed_handler() { return mouse_pressed_handler_; }
   Window* mouse_moved_handler() { return mouse_moved_handler_; }
 
   // Repost event for re-processing. Used when exiting context menus.
-  // We only support the ET_MOUSE_PRESSED and ET_GESTURE_TAP_DOWN event
-  // types (although the latter is currently a no-op).
-  void RepostEvent(const ui::LocatedEvent& event);
+  // We support the ET_MOUSE_PRESSED, ET_TOUCH_PRESSED and ET_GESTURE_TAP_DOWN
+  // event types (although the latter is currently a no-op).
+  void RepostEvent(const ui::LocatedEvent* event);
 
   // Invoked when the mouse events get enabled or disabled.
   void OnMouseEventsEnableStateChanged(bool enabled);
 
   void DispatchCancelModeEvent();
 
   // Dispatches a ui::ET_MOUSE_EXITED event at |point| to the |target|
   // If the |target| is NULL, we will dispatch the event to the root-window
   // TODO(beng): needed only for WTH::OnCursorVisibilityChanged().
   ui::EventDispatchDetails DispatchMouseExitAtPoint(Window* target,
@@ skipping 191 matching lines @@
 
   // Used to schedule DispatchHeldEvents() when |move_hold_count_| goes to 0.
   base::WeakPtrFactory<WindowEventDispatcher> held_event_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowEventDispatcher);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_EVENT_DISPATCHER_H_