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 05b4b7fe8fdd2754b01bf75b3ef749d708b96d3c..5fb3f118bc4b99e6592a9bbe4a9053768f178284 100644
--- a/ui/events/events_stub.cc
+++ b/ui/events/events_stub.cc
@@ -98,6 +98,16 @@ float GetTouchAngle(const base::NativeEvent& native_event) {
   return 0.f;
 }
 
+float GetTouchTilt(const base::NativeEvent& native_event) {
+  NOTIMPLEMENTED();
+  return std::numeric_limits<float>::quiet_NaN();
+}
+
+float GetTouchTiltDirection(const base::NativeEvent& native_event) {
+  NOTIMPLEMENTED();
+  return std::numeric_limits<float>::quiet_NaN();
+}
+
 float GetTouchForce(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return 0.f;