Pass MotionEvent tilt angles to Blink on Android.

ui/events/gesture_detection/motion_event_generic.h

Index: ui/events/gesture_detection/motion_event_generic.h
diff --git a/ui/events/gesture_detection/motion_event_generic.h b/ui/events/gesture_detection/motion_event_generic.h
index 635734208bdbd258e2eb784b5785f9ed8d2ded3e..29b7ab6d1eca29329b49c34cc63e5414c3f38b93 100644
--- a/ui/events/gesture_detection/motion_event_generic.h
+++ b/ui/events/gesture_detection/motion_event_generic.h
@@ -28,6 +28,12 @@ struct GESTURE_DETECTION_EXPORT PointerProperties {
   float touch_major;
   float touch_minor;
   float orientation;
+  // TODO(e_hakkinen): Remove either tilt and tilt_orientation or tilt_x and
+  //                   tilt_y.
+  float tilt;
+  float tilt_orientation;
+  float tilt_x;
+  float tilt_y;
   // source_device_id is only used on Aura.
   int source_device_id;
 };
@@ -56,6 +62,12 @@ class GESTURE_DETECTION_EXPORT MotionEventGeneric : public MotionEvent {
   float GetTouchMinor(size_t pointer_index) const override;
   float GetOrientation(size_t pointer_index) const override;
   float GetPressure(size_t pointer_index) const override;
+  // TODO(e_hakkinen): Remove either GetTilt and GetTiltOrientation or GetTiltX
+  //                   and GetTiltY.
+  float GetTilt(size_t pointer_index) const override;
+  float GetTiltOrientation(size_t pointer_index) const override;
+  float GetTiltX(size_t pointer_index) const override;
+  float GetTiltY(size_t pointer_index) const override;
   ToolType GetToolType(size_t pointer_index) const override;
   int GetButtonState() const override;
   int GetFlags() const override;