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

ui/events/x/events_x.cc

Index: ui/events/x/events_x.cc
diff --git a/ui/events/x/events_x.cc b/ui/events/x/events_x.cc
index 8c1b1808040f24d228fa5d2b7dc9a06234112ab1..e3260ec24de4f1c44b85b75b305283f9feb53c4b 100644
--- a/ui/events/x/events_x.cc
+++ b/ui/events/x/events_x.cc
@@ -798,6 +798,11 @@ float GetTouchAngle(const base::NativeEvent& native_event) {
       ui::DeviceDataManagerX11::DT_TOUCH_ORIENTATION, 0.0) / 2.0;
 }
 
+float GetTouchTilt(const base::NativeEvent& native_event) {
+  NOTIMPLEMENTED();
+  return 0.0f;
+}
+
 float GetTouchForce(const base::NativeEvent& native_event) {
   double force = 0.0;
   force = GetTouchParamFromXEvent(native_event,