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 a5a4fbdbf02bf75ff672c18f0e1d751a6dd48d04..36da96303979ed961ae6830e0553473b7a64fb5f 100644
--- a/ui/events/events_stub.cc
+++ b/ui/events/events_stub.cc
@@ -94,6 +94,16 @@ 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;