Remove ID from ui::PointerEvent's constructors

ui/events/event.h

 // Copyright (c) 2012 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_EVENT_H_
 #define UI_EVENTS_EVENT_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 727 matching lines @@
   static bool CanConvertFrom(const Event& event);
 
   PointerEvent(const PointerEvent& pointer_event);
   explicit PointerEvent(const MouseEvent& mouse_event);
   explicit PointerEvent(const TouchEvent& touch_event);
 
   PointerEvent(EventType type,
                const gfx::Point& location,
                const gfx::Point& root_location,
                int flags,
-               int pointer_id,
                int changed_button_flags,
                const PointerDetails& pointer_details,
                base::TimeTicks time_stamp);
 
   int changed_button_flags() const { return changed_button_flags_; }
   void set_changed_button_flags(int flags) { changed_button_flags_ = flags; }
   const PointerDetails& pointer_details() const { return details_; }
 
  private:
   int changed_button_flags_;
@@ skipping 276 matching lines @@
   // dispatched. This field gets a non-zero value only for gestures that are
   // released through TouchDispositionGestureFilter::SendGesture. The gesture
   // events that aren't fired directly in response to processing a touch-event
   // (e.g. timer fired ones), this id is zero. See crbug.com/618738.
   uint32_t unique_touch_event_id_;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_H_