Added experimental Touch.tilt, Touch.tiltDirection support for Android

ui/events/event_utils.h

Index: ui/events/event_utils.h
diff --git a/ui/events/event_utils.h b/ui/events/event_utils.h
index 2a0e699c28f8ccb02a16a6d213e68cc3274f745f..0ff6cc96707e031f9b76330c9ef1678bc7b1cf0e 100644
--- a/ui/events/event_utils.h
+++ b/ui/events/event_utils.h
@@ -132,6 +132,15 @@ EVENTS_EXPORT float GetTouchRadiusY(const base::NativeEvent& native_event);
 // Gets the angle of the major axis away from the X axis. Default is 0.0.
 EVENTS_EXPORT float GetTouchAngle(const base::NativeEvent& native_event);
 
+// Gets the tilt angle of the stylus away from the perpendicular to the screen
+// Default is NaN.
+EVENTS_EXPORT float GetTouchTilt(const base::NativeEvent& native_event);
+
+// Gets the clockwise angle from the X axis to the XY-projection of the stylus.
+// Range is [-180, 180), default is NaN.
+EVENTS_EXPORT float GetTouchTiltDirection(
+    const base::NativeEvent& native_event);
+
 // Gets the force from a native_event. Normalized to be [0, 1]. Default is 0.0.
 EVENTS_EXPORT float GetTouchForce(const base::NativeEvent& native_event);