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 894d5b0f2aded44d4880e4ce2d25b043c4d4477e..4d0e66bb670ad1e9f942ea841cb91e9457f79189 100644
--- a/ui/events/event.cc
+++ b/ui/events/event.cc
@@ -515,6 +515,7 @@ TouchEvent::TouchEvent(const base::NativeEvent& native_event)
       radius_x_(GetTouchRadiusX(native_event)),
       radius_y_(GetTouchRadiusY(native_event)),
       rotation_angle_(GetTouchAngle(native_event)),
+      tilt_(GetTouchTilt(native_event)),
       force_(GetTouchForce(native_event)) {
   latency()->AddLatencyNumberWithTimestamp(
       INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
@@ -538,6 +539,7 @@ TouchEvent::TouchEvent(EventType type,
       radius_x_(0.0f),
       radius_y_(0.0f),
       rotation_angle_(0.0f),
+      tilt_(0.0f),
       force_(0.0f) {
   latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0);
 }
@@ -550,12 +552,14 @@ TouchEvent::TouchEvent(EventType type,
                        float radius_x,
                        float radius_y,
                        float angle,
+                       float tilt,
                        float force)
     : LocatedEvent(type, location, location, time_stamp, flags),
       touch_id_(touch_id),
       radius_x_(radius_x),
       radius_y_(radius_y),
       rotation_angle_(angle),
+      tilt_(tilt),
       force_(force) {
   latency()->AddLatencyNumber(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, 0);
 }