Absolute Device Orientation API: blink implementation.

third_party/WebKit/Source/modules/device_orientation/DeviceOrientationController.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DeviceOrientationController_h
 #define DeviceOrientationController_h
 
 #include "core/dom/Document.h"
 #include "core/frame/DeviceSingleWindowEventController.h"
 #include "modules/ModulesExport.h"
 
 namespace blink {
 
 class DeviceOrientationData;
+class DeviceOrientationDispatcher;
 class Event;
 
-class MODULES_EXPORT DeviceOrientationController final : public DeviceSingleWindowEventController, public WillBeHeapSupplement<Document> {
+class MODULES_EXPORT DeviceOrientationController : public DeviceSingleWindowEventController, public WillBeHeapSupplement<Document> {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DeviceOrientationController);
 public:
     ~DeviceOrientationController() override;
 
     static const char* supplementName();
     static DeviceOrientationController& from(Document&);
 
     // Inherited from DeviceSingleWindowEventController.
     void didUpdateData() override;
     void didAddEventListener(LocalDOMWindow*, const AtomicString& eventType) override;
 
     void setOverride(DeviceOrientationData*);
     void clearOverride();
 
     DECLARE_VIRTUAL_TRACE();
 
-private:
+protected:
     explicit DeviceOrientationController(Document&);
 
+    virtual DeviceOrientationDispatcher& dispatcherInstance() const;
+
+private:
     // Inherited from DeviceEventControllerBase.
     void registerWithDispatcher() override;
     void unregisterWithDispatcher() override;
     bool hasLastData() override;
 
     // Inherited from DeviceSingleWindowEventController.
     PassRefPtrWillBeRawPtr<Event> lastEvent() const override;
     const AtomicString& eventTypeName() const override;
     bool isNullEvent(Event*) const override;
 
     DeviceOrientationData* lastData() const;
 
     PersistentWillBeMember<DeviceOrientationData> m_overrideOrientationData;
 };
 
 } // namespace blink
 
 #endif // DeviceOrientationController_h