ozone: Cancel all touches once a single touch is cancelled

ui/events/ozone/evdev/touch_event_converter_evdev.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_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_
 #define UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 65 matching lines @@
   EventType GetEventTypeForTouch(const InProgressTouchEvdev& touch);
 
   void ReportTouchEvent(const InProgressTouchEvdev& event,
                         EventType event_type,
                         base::TimeTicks timestamp);
   void ReportEvents(base::TimeTicks timestamp);
 
   void UpdateTrackingId(int slot, int tracking_id);
   void ReleaseTouches();
   void ReleaseButtons();
+  void CancelAllTouches();
   // Normalize pressure value to [0, 1].
   float ScalePressure(int32_t value);
 
   int NextTrackingId();
 
   // Dispatcher for events.
   DeviceEventDispatcherEvdev* dispatcher_;
 
   // Set if we drop events in kernel (SYN_DROPPED) or in process.
   bool dropped_events_ = false;
@@ skipping 45 matching lines @@
 
   // Callback to enable/disable palm suppression.
   base::Callback<void(bool)> enable_palm_suppression_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchEventConverterEvdev);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_OZONE_EVDEV_TOUCH_EVENT_CONVERTER_EVDEV_H_