Add the first very basic bits of a geofencing API.

Source/modules/geolocation/Geolocation.cpp

Index: Source/modules/geolocation/Geolocation.cpp
diff --git a/Source/modules/geolocation/Geolocation.cpp b/Source/modules/geolocation/Geolocation.cpp
index 25954ea9b4be3d65c15d48f1eb2b0e9ecdacbd62..ee8c7742abe28fb86257e94d29b6fe2cb22d90e5 100644
--- a/Source/modules/geolocation/Geolocation.cpp
+++ b/Source/modules/geolocation/Geolocation.cpp
@@ -28,8 +28,11 @@
 #include "config.h"
 #include "modules/geolocation/Geolocation.h"
 
+#include "core/dom/DOMException.h"
 #include "core/dom/Document.h"
+#include "core/dom/ExceptionCode.h"
 #include "modules/geolocation/Coordinates.h"
+#include "modules/geolocation/GeofencingRegion.h"
 #include "modules/geolocation/GeolocationController.h"
 #include "modules/geolocation/GeolocationError.h"
 #include "modules/geolocation/GeolocationPosition.h"
@@ -681,4 +684,19 @@ void Geolocation::handlePendingPermissionNotifiers()
     }
 }
 
+ScriptPromise Geolocation::registerRegion(ScriptState* scriptState, GeofencingRegion* region)
+{
+    return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError));
+}
+
+ScriptPromise Geolocation::unregisterRegion(ScriptState* scriptState, const String& regionId)
+{
+    return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError));
+}
+
+ScriptPromise Geolocation::getRegisteredRegions(ScriptState* scriptState) const
+{
+    return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError));
+}
+
 } // namespace WebCore