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

Source/core/frame/DeviceEventDispatcherBase.h

Index: Source/core/frame/DeviceEventDispatcherBase.h
diff --git a/Source/core/frame/DeviceSensorEventDispatcher.h b/Source/core/frame/DeviceEventDispatcherBase.h
similarity index 77%
copy from Source/core/frame/DeviceSensorEventDispatcher.h
copy to Source/core/frame/DeviceEventDispatcherBase.h
index 26c269515f95d1bf6c5a51c0928273eebb6ff625..d8b1593cad67b2c0e601b8281c64f2bbc89c80d2 100644
--- a/Source/core/frame/DeviceSensorEventDispatcher.h
+++ b/Source/core/frame/DeviceEventDispatcherBase.h
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -28,31 +28,36 @@
  * 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 DeviceEventDispatcherBase {
+public:
+    void addController(DeviceEventControllerBase*);
+    void removeController(DeviceEventControllerBase*);
 
-class DeviceSensorEventDispatcher {
 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