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

ui/events/cocoa/events_mac.mm

Index: ui/events/cocoa/events_mac.mm
diff --git a/ui/events/cocoa/events_mac.mm b/ui/events/cocoa/events_mac.mm
index 4772b2728333c9908cfcad11076ff002a1649755..9cd536ed27b2da7715c3334d328f3c2e60f032a8 100644
--- a/ui/events/cocoa/events_mac.mm
+++ b/ui/events/cocoa/events_mac.mm
@@ -188,6 +188,11 @@ 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;