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

Source/core/frame/DeviceSingleWindowEventController.cpp

Index: Source/core/frame/DeviceSingleWindowEventController.cpp
diff --git a/Source/core/frame/DeviceSingleWindowEventController.cpp b/Source/core/frame/DeviceSingleWindowEventController.cpp
deleted file mode 100644
index 91f852bbfc18333139a8a76a65954f886f0c4163..0000000000000000000000000000000000000000
--- a/Source/core/frame/DeviceSingleWindowEventController.cpp
+++ /dev/null
@@ -1,73 +0,0 @@
-// 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.
-
-#include "config.h"
-#include "core/frame/DeviceSingleWindowEventController.h"
-
-#include "core/dom/Document.h"
-#include "core/frame/DOMWindow.h"
-#include "core/page/Page.h"
-
-namespace WebCore {
-
-DeviceSingleWindowEventController::DeviceSingleWindowEventController(Document& document)
-    : DeviceEventControllerBase(document.page())
-    , DOMWindowLifecycleObserver(document.domWindow())
-    , m_needsCheckingNullEvents(true)
-    , m_document(document)
-{
-}
-
-DeviceSingleWindowEventController::~DeviceSingleWindowEventController()
-{
-}
-
-void DeviceSingleWindowEventController::didUpdateData()
-{
-    dispatchDeviceEvent(lastEvent());
-}
-
-void DeviceSingleWindowEventController::dispatchDeviceEvent(PassRefPtrWillBeRawPtr<Event> prpEvent)
-{
-    if (!m_document.domWindow() || m_document.activeDOMObjectsAreSuspended() || m_document.activeDOMObjectsAreStopped())
-        return;
-
-    RefPtrWillBeRawPtr<Event> event = prpEvent;
-    m_document.domWindow()->dispatchEvent(event);
-
-    if (m_needsCheckingNullEvents) {
-        if (isNullEvent(event.get()))
-            stopUpdating();
-        else
-            m_needsCheckingNullEvents = false;
-    }
-}
-
-void DeviceSingleWindowEventController::didAddEventListener(DOMWindow* window, const AtomicString& eventType)
-{
-    if (eventType != eventTypeName())
-        return;
-
-    if (page() && page()->visibilityState() == PageVisibilityStateVisible)
-        startUpdating();
-
-    m_hasEventListener = true;
-}
-
-void DeviceSingleWindowEventController::didRemoveEventListener(DOMWindow* window, const AtomicString& eventType)
-{
-    if (eventType != eventTypeName() || window->hasEventListeners(eventTypeName()))
-        return;
-
-    stopUpdating();
-    m_hasEventListener = false;
-}
-
-void DeviceSingleWindowEventController::didRemoveAllEventListeners(DOMWindow*)
-{
-    stopUpdating();
-    m_hasEventListener = false;
-}
-
-} // namespace WebCore