WebKit & WebCore part of the device motion implementation using the platform layer.

Source/WebCore/page/DeviceController.h

 /*
- * Copyright 2010, The Android Open Source Project
- * Copyright (C) 2012 Samsung Electronics. All rights reserved.
+ * 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:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. 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.
+ * modification, are permitted provided that the following conditions are
+ * met:
  *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ *     * 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.
  */

[Peter Beverloo, 2013/04/09 17:29:53]

We can't just change the copyright header and this file's license if
Android/Samsung touched it before.  Best to just leave it.

[timvolodine, 2013/04/10 19:06:12]

Done.

 
 #ifndef DeviceController_h
 #define DeviceController_h
 
 #include "DOMWindow.h"
 #include "Event.h"
 #include "Supplementable.h"
 #include "Timer.h"
 #include <wtf/HashCountedSet.h>
 
 namespace WebCore {
 
 class DeviceClient;
 class Page;
 
 class DeviceController : public Supplement<Page> {
 public:
+    // FIXME(timvolodine): remove this constructor and all references to DeviceClient

[Peter Beverloo, 2013/04/09 17:29:53]

nit: FIXMEs in WebKit code are unattributed.

[timvolodine, 2013/04/10 19:06:12]

Done.

+    // once the device orientation is switched to platform implementation.
     explicit DeviceController(DeviceClient*);
     ~DeviceController() { }
 
     void addDeviceEventListener(DOMWindow*);
     void removeDeviceEventListener(DOMWindow*);
     void removeAllDeviceEventListeners(DOMWindow*);
 
     void dispatchDeviceEvent(PassRefPtr<Event>);
     bool isActive() { return !m_listeners.isEmpty(); }
     DeviceClient* client() { return m_client; }
 
     virtual bool hasLastData() { return false; }
     virtual PassRefPtr<Event> getLastEvent() { return 0; }
 
 protected:
+    DeviceController() : m_timer(this, &DeviceController::fireDeviceEvent) { }

[Peter Beverloo, 2013/04/09 17:29:53]

Do we have any static analysis tools which may assert that m_client is not being
initialized properly?  We should verify that with try-bots..

[timvolodine, 2013/04/10 19:06:12]

ok I've added init to null

     void fireDeviceEvent(Timer<DeviceController>*);
 
     HashCountedSet<RefPtr<DOMWindow> > m_listeners;
     HashCountedSet<RefPtr<DOMWindow> > m_lastEventListeners;
     DeviceClient* m_client;
     Timer<DeviceController> m_timer;
 };
 
 } // namespace WebCore
 
 #endif // DeviceController_h