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

ui/events/gesture_detection/motion_event.h

Index: ui/events/gesture_detection/motion_event.h
diff --git a/ui/events/gesture_detection/motion_event.h b/ui/events/gesture_detection/motion_event.h
index 560afcbd044c20155ed281e7762f33ddbba77bb7..643f71f10a955de828314c4fedde20cc22b55da9 100644
--- a/ui/events/gesture_detection/motion_event.h
+++ b/ui/events/gesture_detection/motion_event.h
@@ -60,6 +60,7 @@ class GESTURE_DETECTION_EXPORT MotionEvent {
   virtual float GetTouchMajor(size_t pointer_index) const = 0;
   virtual float GetTouchMinor(size_t pointer_index) const = 0;
   virtual float GetOrientation(size_t pointer_index) const = 0;
+  virtual float GetTilt(size_t pointer_index) const = 0;
   virtual float GetPressure(size_t pointer_index) const = 0;
   virtual ToolType GetToolType(size_t pointer_index) const = 0;
   virtual int GetButtonState() const = 0;
@@ -94,6 +95,8 @@ class GESTURE_DETECTION_EXPORT MotionEvent {
   // radians. The return value lies in [-PI/2, PI/2].
   float GetOrientation() const { return GetOrientation(0); }
 
+  float GetTilt() const { return GetTilt(0); }

[jdduke (slow), 2014/11/26 18:13:29]

This property probably deserves a comment as the Android description is
non-trivial
(http://developer.android.com/reference/android/view/MotionEvent.html#AXIS_ORI...).

[d.pikalov, 2014/11/28 13:55:12]

Done.

+
   float GetPressure() const { return GetPressure(0); }
   ToolType GetToolType() const { return GetToolType(0); }