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

Source/modules/geofencing/Geofencing.h

Index: Source/modules/geofencing/Geofencing.h
diff --git a/Source/modules/push_messaging/PushManager.h b/Source/modules/geofencing/Geofencing.h
similarity index 45%
copy from Source/modules/push_messaging/PushManager.h
copy to Source/modules/geofencing/Geofencing.h
index a0d06a9d2d68193569713df179f1a6c14e2b136a..434a860329c03cfb3e00980028641dde8501ae95 100644
--- a/Source/modules/push_messaging/PushManager.h
+++ b/Source/modules/geofencing/Geofencing.h
@@ -2,8 +2,8 @@
 // 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"
@@ -12,24 +12,27 @@
 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