Separate GeolocationWatchers from Geolocation

Source/modules/geolocation/GeolocationWatchers.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 GeolocationWatchers_h
+#define GeolocationWatchers_h
+
+#include "platform/heap/Handle.h"
+
+namespace WebCore {
+
+class GeoNotifier;
+
+class GeolocationWatchers {
+    DISALLOW_ALLOCATION();
+
+public:
+    GeolocationWatchers() { }
+    void trace(Visitor*);
+
+    bool add(int id, GeoNotifier*);
+    GeoNotifier* find(int id);
+    void remove(int id);
+    void remove(GeoNotifier*);
+    bool contains(GeoNotifier*) const;
+    void clear();
+    bool isEmpty() const;
+
+    void getNotifiersVector(HeapVector<Member<GeoNotifier> >&) const;
+
+private:
+    typedef HeapHashMap<int, Member<GeoNotifier> > IdToNotifierMap;
+    typedef HeapHashMap<Member<GeoNotifier>, int> NotifierToIdMap;
+
+    IdToNotifierMap m_idToNotifierMap;
+    NotifierToIdMap m_notifierToIdMap;
+};
+
+} // namespace WebCore
+
+#endif // GeolocationWatchers_h