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

Source/modules/device_orientation/DeviceMotionDispatcher.cpp

 /*
  * Copyright (C) 2013 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
@@ skipping 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "modules/device_orientation/DeviceMotionDispatcher.h"
 
 #include "modules/device_orientation/DeviceMotionController.h"
 #include "modules/device_orientation/DeviceMotionData.h"
 #include "public/platform/Platform.h"
-#include "wtf/TemporaryChange.h"
 
 namespace WebCore {
 
 DeviceMotionDispatcher& DeviceMotionDispatcher::instance()
 {
     DEFINE_STATIC_LOCAL(DeviceMotionDispatcher, deviceMotionDispatcher, ());
     return deviceMotionDispatcher;
 }
 
 DeviceMotionDispatcher::DeviceMotionDispatcher()
 {
 }
 
 DeviceMotionDispatcher::~DeviceMotionDispatcher()
 {
 }
 
-void DeviceMotionDispatcher::addDeviceMotionController(DeviceMotionController* controller)
-{
-    addController(controller);
-}
-
-void DeviceMotionDispatcher::removeDeviceMotionController(DeviceMotionController* controller)
-{
-    removeController(controller);
-}
-
 void DeviceMotionDispatcher::startListening()
 {
     blink::Platform::current()->setDeviceMotionListener(this);
 }
 
 void DeviceMotionDispatcher::stopListening()
 {
     blink::Platform::current()->setDeviceMotionListener(0);
     m_lastDeviceMotionData.clear();
 }
 
 void DeviceMotionDispatcher::didChangeDeviceMotion(const blink::WebDeviceMotionData& motion)
 {
     m_lastDeviceMotionData = DeviceMotionData::create(motion);
-
-    {
-        TemporaryChange<bool> changeIsDispatching(m_isDispatching, true);
-        // Don't fire controllers removed or added during event dispatch.
-        size_t size = m_controllers.size();
-        for (size_t i = 0; i < size; ++i) {
-            if (m_controllers[i])
-                static_cast<DeviceMotionController*>(m_controllers[i])->didChangeDeviceMotion(m_lastDeviceMotionData.get());
-        }
-    }
-
-    if (m_needsPurge)
-        purgeControllers();
+    notifyControllers();
 }
 
 DeviceMotionData* DeviceMotionDispatcher::latestDeviceMotionData()
 {
     return m_lastDeviceMotionData.get();
 }
 
 } // namespace WebCore