Add isPageVisible to Page

third_party/WebKit/Source/modules/screen_orientation/ScreenOrientationController.cpp

 // 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 "modules/screen_orientation/ScreenOrientationController.h"
 
 #include "core/events/Event.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 88 matching lines @@
         orientationType = computeOrientation(chromeClient.screenInfo().rect, effectiveAngle(chromeClient));
     }
     ASSERT(orientationType != WebScreenOrientationUndefined);
 
     m_orientation->setType(orientationType);
     m_orientation->setAngle(effectiveAngle(chromeClient));
 }
 
 bool ScreenOrientationController::isActiveAndVisible() const
 {
-    return m_orientation && frame() && page() && page()->visibilityState() == PageVisibilityStateVisible;
+    return m_orientation && frame() && page() && page()->isPageVisible();
 }
 
 void ScreenOrientationController::pageVisibilityChanged()
 {
     notifyDispatcher();
 
     if (!isActiveAndVisible())
         return;
 
     // The orientation type and angle are tied in a way that if the angle has
@@ skipping 103 matching lines @@
     return true;
 }
 
 void ScreenOrientationController::willDetachFrameHost()
 {
     m_client = nullptr;
 }
 
 void ScreenOrientationController::notifyDispatcher()
 {
-    if (m_orientation && page()->visibilityState() == PageVisibilityStateVisible)
+    if (m_orientation && page()->isPageVisible())
         startUpdating();
     else
         stopUpdating();
 }
 
 DEFINE_TRACE(ScreenOrientationController)
 {
     visitor->trace(m_orientation);
     LocalFrameLifecycleObserver::trace(visitor);
     WillBeHeapSupplement<LocalFrame>::trace(visitor);
     PlatformEventController::trace(visitor);
 }
 
 } // namespace blink