Scale touch event radius

ui/events/x/device_data_manager_x11.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_X_DEVICE_DATA_MANAGER_X11_H_
 #define UI_EVENTS_X_DEVICE_DATA_MANAGER_X11_H_
 
 // Generically-named #defines from Xlib is conflicting with symbols in GTest.
 // So many tests .cc file #undef Bool before including device_data_manager.h,
 // which makes Bool unrecognized in XInput2.h.
@@ skipping 65 matching lines @@
     // Beginning of touch data types.
 
     // Define the valuators following the Multi-touch Protocol. Used by
     // touchscreen devices.
     DT_TOUCH_MAJOR,       // Length of the touch area.
     DT_TOUCH_MINOR,       // Width of the touch area.
     DT_TOUCH_ORIENTATION, // Angle between the X-axis and the major axis of the
                           // touch area.
     DT_TOUCH_PRESSURE,    // Pressure of the touch contact.
 
+    DT_TOUCH_POSITION_X,  // Touch X position.
+    DT_TOUCH_POSITION_Y,  // Touch Y position.
+
     // NOTE for XInput MT: 'Tracking ID' is provided in every touch event to
     // track individual touch. 'Tracking ID' is an unsigned 32-bit value and
     // is increased for each new touch. It will wrap back to 0 when reaching
     // the numerical limit.
     DT_TOUCH_TRACKING_ID, // ID of the touch point.
 
     // Kernel timestamp from touch screen (if available).
     DT_TOUCH_RAW_TIMESTAMP,
 
     // End of touch data types.
@@ skipping 212 matching lines @@
 
   unsigned char button_map_[256];
   int button_map_count_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceDataManagerX11);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_X_DEVICE_DATA_MANAGER_X11_H_