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

Source/modules/device_orientation/DeviceOrientationController.cpp

Index: Source/modules/device_orientation/DeviceOrientationController.cpp
diff --git a/Source/modules/device_orientation/DeviceOrientationController.cpp b/Source/modules/device_orientation/DeviceOrientationController.cpp
index 98e04dd6e5529f445bfa90d4b23121ef8383d21b..23b943df73f3280fc2a91e5793c9d8a2f5935896 100644
--- a/Source/modules/device_orientation/DeviceOrientationController.cpp
+++ b/Source/modules/device_orientation/DeviceOrientationController.cpp
@@ -1,12 +1,35 @@
-// 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.
+/*
+ * Copyright 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2012 Samsung Electronics. 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 copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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.
+ */
 
 #include "config.h"
 #include "modules/device_orientation/DeviceOrientationController.h"
 
 #include "core/dom/Document.h"
-#include "modules/EventModules.h"
+#include "core/frame/DOMWindow.h"
+#include "core/page/Page.h"
 #include "modules/device_orientation/DeviceOrientationData.h"
 #include "modules/device_orientation/DeviceOrientationDispatcher.h"
 #include "modules/device_orientation/DeviceOrientationEvent.h"
@@ -14,7 +37,9 @@
 namespace WebCore {
 
 DeviceOrientationController::DeviceOrientationController(Document& document)
-    : DeviceSingleWindowEventController(document)
+    : DeviceSensorEventController(document.page())
+    , DOMWindowLifecycleObserver(document.domWindow())
+    , m_document(document)
 {
 }
 
@@ -23,11 +48,11 @@
     stopUpdating();
 }
 
-void DeviceOrientationController::didUpdateData()
+void DeviceOrientationController::didChangeDeviceOrientation(DeviceOrientationData* deviceOrientationData)
 {
     if (m_overrideOrientationData)
         return;
-    dispatchDeviceEvent(lastEvent());
+    dispatchDeviceEvent(DeviceOrientationEvent::create(EventTypeNames::deviceorientation, deviceOrientationData));
 }
 
 const char* DeviceOrientationController::supplementName()
@@ -45,7 +70,7 @@
     return *controller;
 }
 
-DeviceOrientationData* DeviceOrientationController::lastData() const
+DeviceOrientationData* DeviceOrientationController::lastData()
 {
     return m_overrideOrientationData ? m_overrideOrientationData.get() : DeviceOrientationDispatcher::instance().latestDeviceOrientationData();
 }
@@ -55,37 +80,63 @@
     return lastData();
 }
 
+PassRefPtrWillBeRawPtr<Event> DeviceOrientationController::getLastEvent()
+{
+    return DeviceOrientationEvent::create(EventTypeNames::deviceorientation, lastData());
+}
+
 void DeviceOrientationController::registerWithDispatcher()
 {
-    DeviceOrientationDispatcher::instance().addController(this);
+    DeviceOrientationDispatcher::instance().addDeviceOrientationController(this);
 }
 
 void DeviceOrientationController::unregisterWithDispatcher()
 {
-    DeviceOrientationDispatcher::instance().removeController(this);
+    DeviceOrientationDispatcher::instance().removeDeviceOrientationController(this);
 }
 
-PassRefPtrWillBeRawPtr<Event> DeviceOrientationController::lastEvent() const
-{
-    return DeviceOrientationEvent::create(eventTypeName(), lastData());
-}
-
-bool DeviceOrientationController::isNullEvent(Event* event) const
+bool DeviceOrientationController::isNullEvent(Event* event)
 {
     DeviceOrientationEvent* orientationEvent = toDeviceOrientationEvent(event);
     return !orientationEvent->orientation()->canProvideEventData();
 }
 
-const AtomicString& DeviceOrientationController::eventTypeName() const
+Document* DeviceOrientationController::document()
 {
-    return EventTypeNames::deviceorientation;
+    return &m_document;
+}
+
+void DeviceOrientationController::didAddEventListener(DOMWindow* window, const AtomicString& eventType)
+{
+    if (eventType != EventTypeNames::deviceorientation)
+        return;
+
+    if (page() && page()->visibilityState() == PageVisibilityStateVisible)
+        startUpdating();
+
+    m_hasEventListener = true;
+}
+
+void DeviceOrientationController::didRemoveEventListener(DOMWindow* window, const AtomicString& eventType)
+{
+    if (eventType != EventTypeNames::deviceorientation || window->hasEventListeners(EventTypeNames::deviceorientation))
+        return;
+
+    stopUpdating();
+    m_hasEventListener = false;
+}
+
+void DeviceOrientationController::didRemoveAllEventListeners(DOMWindow* window)
+{
+    stopUpdating();
+    m_hasEventListener = false;
 }
 
 void DeviceOrientationController::setOverride(DeviceOrientationData* deviceOrientationData)
 {
-    ASSERT(deviceOrientationData);
+    m_overrideOrientationData.clear();
+    didChangeDeviceOrientation(deviceOrientationData);
     m_overrideOrientationData = deviceOrientationData;
-    dispatchDeviceEvent(lastEvent());
 }
 
 void DeviceOrientationController::clearOverride()
@@ -93,8 +144,9 @@
     if (!m_overrideOrientationData)
         return;
     m_overrideOrientationData.clear();
-    if (lastData())
-        didUpdateData();
+    DeviceOrientationData* orientation = lastData();
+    if (orientation)
+        didChangeDeviceOrientation(orientation);
 }
 
 void DeviceOrientationController::trace(Visitor* visitor)