Pass through geofencing API calls to the content layer.

Source/modules/geofencing/GeofencingRegion.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GeofencingRegion_h
 #define GeofencingRegion_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class GeofencingRegion : public GarbageCollectedFinalized<GeofencingRegion>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
     WTF_MAKE_NONCOPYABLE(GeofencingRegion);
 public:
     virtual ~GeofencingRegion() { }
 
     String id() const { return m_id; }
 
     virtual void trace(Visitor*) { }
 
+    // For SpecialWrapFor
+    virtual bool isCircularGeofencingRegion() const { return false; }
+
 protected:
-    GeofencingRegion(const String& id) : m_id(id) { }
+    explicit GeofencingRegion(const String& id) : m_id(id) { }
 
 private:
     String m_id;
 };
 
 } // namespace blink
 
 #endif // GeofencingRegion_h