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

ui/events/events_stub.cc

Index: ui/events/events_stub.cc
diff --git a/ui/events/events_stub.cc b/ui/events/events_stub.cc
index 5c8397400a5d4e4e64979a931d4a1ce8ff7748c7..65b6281ad15a4ae32e28ebd7d6922cd61c60952d 100644
--- a/ui/events/events_stub.cc
+++ b/ui/events/events_stub.cc
@@ -97,6 +97,11 @@ float GetTouchAngle(const base::NativeEvent& native_event) {
   return 0.f;
 }
 
+float GetTouchTilt(const base::NativeEvent& native_event) {
+  NOTIMPLEMENTED();
+  return 0.f;
+}
+
 float GetTouchForce(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return 0.f;