Generalize and refactor DeviceSensorEvent* architecture to support multi-event type targets.

Source/core/frame/DeviceEventDispatcherBase.h

 /*
- * Copyright (C) 2013 Google Inc. All rights reserved.
+ * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef DeviceSensorEventDispatcher_h
-#define DeviceSensorEventDispatcher_h
+#ifndef DeviceEventDispatcherBase_h
+#define DeviceEventDispatcherBase_h
 
 #include "wtf/Vector.h"
 
 namespace WebCore {
-class DeviceSensorEventController;
+class DeviceEventControllerBase;
 
-class DeviceSensorEventDispatcher {
+class DeviceEventDispatcherBase {
+public:
+    void addController(DeviceEventControllerBase*);
+    void removeController(DeviceEventControllerBase*);
+
 protected:
-    DeviceSensorEventDispatcher();
-    virtual ~DeviceSensorEventDispatcher();
+    DeviceEventDispatcherBase();
+    virtual ~DeviceEventDispatcherBase();
 
-    void addController(DeviceSensorEventController*);
-    void removeController(DeviceSensorEventController*);
-    void purgeControllers();
+    void notifyControllers();
 
     virtual void startListening() = 0;
     virtual void stopListening() = 0;
 
-    Vector<DeviceSensorEventController*> m_controllers;
+private:
+    void purgeControllers();
+
+    Vector<DeviceEventControllerBase*> m_controllers;
     bool m_needsPurge;
     bool m_isDispatching;
 };
 
 } // namespace WebCore
 
-#endif // DeviceSensorEventDispatcher_h
+#endif // DeviceEventDispatcherBase_h