Move DeviceSensorEvent* h|cpp files to a common module

Source/core/frame/DeviceSensorEventDispatcher.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 11 matching lines @@
  * 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.
  */
 
 #include "config.h"
-#include "modules/device_orientation/DeviceSensorEventDispatcher.h"
+#include "core/frame/DeviceSensorEventDispatcher.h"
 
 namespace WebCore {
 
 DeviceSensorEventDispatcher::DeviceSensorEventDispatcher()
     : m_needsPurge(false)
     , m_isDispatching(false)
 {
 }
 
 DeviceSensorEventDispatcher::~DeviceSensorEventDispatcher()
 {
 }
 
 void DeviceSensorEventDispatcher::addController(DeviceSensorEventController* controller)
 {
     bool wasEmpty = m_controllers.isEmpty();
     if (!m_controllers.contains(controller))
         m_controllers.append(controller);
     if (wasEmpty)
         startListening();
 }
 
 void DeviceSensorEventDispatcher::removeController(DeviceSensorEventController* controller)
 {
     // Do not actually remove the controller from the vector, instead zero them out.
     // The zeros are removed in these two cases:
     // 1. either immediately if we are not dispatching any events,
     // 2. or after didChangeDeviceMotion/Orientation has dispatched all events.

[timvolodine, 2014/03/13 12:05:13]

Actually we should change this as well since the referred methods are still in
the module. I think it should be something like:
"
2. or after events to all controllers have dispatched
(see e.g. DeviceOrientationDispatcher::didChangeDeviceOrientation).
This is to correctly handle the re-entrancy case when a controller is destroyed
while the events are still being dispatched.
"

[riju_, 2014/03/13 12:23:03]

Done.

     // This is to correctly handle the re-entrancy case when a controller is destroyed
     // while in the didChangeDeviceMotion/Orientation method.
     size_t index = m_controllers.find(controller);
     if (index == kNotFound)
         return;
 
     m_controllers[index] = 0;
     m_needsPurge = true;
 
     if (!m_isDispatching)
@@ skipping 14 matching lines @@
         }
     }
 
     m_needsPurge = false;
 
     if (m_controllers.isEmpty())
         stopListening();
 }
 
 } // namespace WebCore