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

ui/events/event.cc

Index: ui/events/event.cc
diff --git a/ui/events/event.cc b/ui/events/event.cc
index 5e7d8c86377a4d6a7c5546dcde02b6a76e6c71d4..3e812986149edcd3f259c08b94314ce161836489 100644
--- a/ui/events/event.cc
+++ b/ui/events/event.cc
@@ -532,6 +532,8 @@ TouchEvent::TouchEvent(const base::NativeEvent& native_event)
       radius_y_(GetTouchRadiusY(native_event)),
       rotation_angle_(GetTouchAngle(native_event)),
       force_(GetTouchForce(native_event)),
+      tilt_(GetTouchTilt(native_event)),
+      tiltDirection_(GetTouchTiltDirection(native_event)),
       may_cause_scrolling_(false),
       should_remove_native_touch_id_mapping_(false) {
   latency()->AddLatencyNumberWithTimestamp(
@@ -555,6 +557,8 @@ TouchEvent::TouchEvent(EventType type,
       radius_y_(0.0f),
       rotation_angle_(0.0f),
       force_(0.0f),
+      tilt_(std::numeric_limits<float>::quiet_NaN()),
+      tiltDirection_(std::numeric_limits<float>::quiet_NaN()),
       may_cause_scrolling_(false),
       should_remove_native_touch_id_mapping_(false) {
   latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0);
@@ -568,7 +572,9 @@ TouchEvent::TouchEvent(EventType type,
                        float radius_x,
                        float radius_y,
                        float angle,
-                       float force)
+                       float force,
+                       float tilt,
+                       float tiltDirection)
     : LocatedEvent(type, location, location, time_stamp, flags),
       touch_id_(touch_id),
       unique_event_id_(get_next_touch_event_id()),
@@ -576,6 +582,8 @@ TouchEvent::TouchEvent(EventType type,
       radius_y_(radius_y),
       rotation_angle_(angle),
       force_(force),
+      tilt_(tilt),
+      tiltDirection_(tiltDirection),
       may_cause_scrolling_(false),
       should_remove_native_touch_id_mapping_(false) {
   latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0);