[Touch Adjustment] Pass primary_pointer_type to WebGestureEvent and disable adjustment for stylus

ui/events/gesture_detection/gesture_event_data.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_GESTURE_DETECTION_GESTURE_EVENT_DATA_H_
 #define UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DATA_H_
 
 #include <stddef.h>
 
 #include "base/time/time.h"
@@ skipping 19 matching lines @@
                    const gfx::RectF& bounding_box,
                    int flags,
                    uint32_t unique_touch_event_id);
   GestureEventData(EventType type, const GestureEventData&);
   GestureEventData(const GestureEventData& other);
 
   EventType type() const { return details.type(); }
 
   GestureEventDetails details;
   int motion_event_id;
+  // The tool type for the first touch point in the gesture.
   MotionEvent::ToolType primary_tool_type;
   base::TimeTicks time;
   float x;
   float y;
   float raw_x;
   float raw_y;
   int flags;
 
   // The unique id of the touch event that released the gesture event. This
   // field gets a non-zero from the corresponding field in
   // GestureEventDataPacket at the moment the gesture is pushed into the packet.
   uint32_t unique_touch_event_id;
 
  private:
   friend class GestureEventDataPacket;
 
   // Initializes type to GESTURE_TYPE_INVALID.
   GestureEventData();
 };
 
 }  //  namespace ui
 
 #endif  // UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DATA_H_