Re-add deprecation warnings for device orientation and device motion.

Source/core/frame/UseCounter.cpp

Index: Source/core/frame/UseCounter.cpp
diff --git a/Source/core/frame/UseCounter.cpp b/Source/core/frame/UseCounter.cpp
index 67b93e02f770ab6f5e5c8fbb047b145a73e94aa3..0891c1ee649eba04e6dea7c9e640a7292e828e22 100644
--- a/Source/core/frame/UseCounter.cpp
+++ b/Source/core/frame/UseCounter.cpp
@@ -877,6 +877,12 @@ String UseCounter::deprecationMessage(Feature feature)
         return "'SVGSVGElement.unsuspendRedrawAll()' is deprecated, please do not use it. It is a no-op, as per SVG2 (https://svgwg.org/svg2-draft/struct.html#__svg__SVGSVGElement__unsuspendRedrawAll).";
 
     // Powerful features on insecure origins (https://goo.gl/rStTGz)
+    case DeviceMotionInsecureOrigin:
+        return "The devicemotion event is deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";
+
+    case DeviceOrientationInsecureOrigin:
+        return "The deviceorientation event is deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";
+
     case GeolocationInsecureOrigin:
         return "getCurrentPosition() and watchPosition() are deprecated on insecure origins, and support will be removed in the future. You should consider switching your application to a secure origin, such as HTTPS. See https://goo.gl/rStTGz for more details.";