Move all geofencing code into its own module separate from geolocation.

Source/modules/geofencing/Geofencing.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 PushManager_h
-#define PushManager_h
+#ifndef Geofencing_h
+#define Geofencing_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ExecutionContext;
+class GeofencingRegion;
 class ScriptPromise;
 class ScriptState;
 
-class PushManager FINAL : public GarbageCollected<PushManager>, public ScriptWrappable {
+class Geofencing FINAL : public GarbageCollected<Geofencing>, public ScriptWrappable {
 public:
-    static PushManager* create()
+    static Geofencing* create()
     {
-        return new PushManager();
+        return new Geofencing();
     }
 
-    ScriptPromise registerPushMessaging(ScriptState*, const String& senderId);
+    ScriptPromise registerRegion(ScriptState*, GeofencingRegion*);
+    ScriptPromise unregisterRegion(ScriptState*, const String& regionId);
+    ScriptPromise getRegisteredRegions(ScriptState*) const;
 
-    void trace(Visitor*) { }
+    virtual void trace(Visitor*) { }
 
 private:
-    PushManager();
+    Geofencing();
 };
 
 } // namespace blink
 
-#endif // PushManager_h
+#endif // Geofencing_h