Pass through geofencing API calls to the content layer.

Source/modules/geofencing/CircularRegion.h

Index: Source/modules/geofencing/CircularRegion.h
diff --git a/Source/modules/geofencing/CircularRegion.h b/Source/modules/geofencing/CircularRegion.h
index 628c8be88ec60e51b6ea9ba17733b26d8da018c9..b83280d3c7c7ab678951214d0917f6ac931c8d69 100644
--- a/Source/modules/geofencing/CircularRegion.h
+++ b/Source/modules/geofencing/CircularRegion.h
@@ -6,10 +6,12 @@
 #define CircularRegion_h
 
 #include "modules/geofencing/GeofencingRegion.h"
+#include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Dictionary;
+class WebCircularRegion;
 
 struct CircularRegionInit {
     CircularRegionInit() : latitude(0), longitude(0), radius(0) { }
@@ -27,20 +29,20 @@ public:
     static CircularRegion* create(const Dictionary& init);
     virtual ~CircularRegion() { }
 
-    double latitude() const { return m_latitude; }
-    double longitude() const { return m_longitude; }
-    double radius() const { return m_radius; }
+    double latitude() const;
+    double longitude() const;
+    double radius() const;
 
     virtual void trace(Visitor* visitor) OVERRIDE { GeofencingRegion::trace(visitor); }
 
 private:
-    explicit CircularRegion(const CircularRegionInit&);
+    friend class GeofencingRegion;
 
-    double m_latitude;
-    double m_longitude;
-    double m_radius;
+    explicit CircularRegion(const WebCircularRegion&);
 };
 
+DEFINE_TYPE_CASTS(CircularRegion, GeofencingRegion, region, region->isCircularRegion(), region.isCircularRegion());
+
 } // namespace blink
 
 #endif