Fix movementX/Y attributes for touch pointer events

content/browser/renderer_host/input/input_router_impl.h

 // Copyright 2013 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 CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 69 matching lines @@
 
   void SetFrameTreeNodeId(int frameTreeNodeId) override;
 
  private:
   friend class InputRouterImplTest;
   FRIEND_TEST_ALL_PREFIXES(SitePerProcessBrowserTest,
                            SubframeTouchEventRouting);
   FRIEND_TEST_ALL_PREFIXES(SitePerProcessBrowserTest,
                            MainframeTouchEventRouting);
 
+  // Keeps track of last position of touch points and sets MovementXY for them.
+  void SetMovementXYForTouchPoints(blink::WebTouchEvent* event);
+
   // TouchpadTapSuppressionControllerClient
   void SendMouseEventImmediately(
       const MouseEventWithLatencyInfo& mouse_event) override;
 
   // TouchEventQueueClient
   void SendTouchEventImmediately(
       const TouchEventWithLatencyInfo& touch_event) override;
   void OnTouchEventAck(const TouchEventWithLatencyInfo& event,
                        InputEventAckState ack_result) override;
   void OnFilteringTouchEvent(
@@ skipping 153 matching lines @@
 
   MouseWheelEventQueue wheel_event_queue_;
   std::unique_ptr<TouchEventQueue> touch_event_queue_;
   GestureEventQueue gesture_event_queue_;
   TouchActionFilter touch_action_filter_;
   InputEventStreamValidator input_stream_validator_;
   InputEventStreamValidator output_stream_validator_;
 
   float device_scale_factor_;
 
+  // Last touch position relative to screen. Used to compute movementX/Y.
+  std::map<int, gfx::Point> global_touch_position_;
+
   DISALLOW_COPY_AND_ASSIGN(InputRouterImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_INPUT_INPUT_ROUTER_IMPL_H_