Add isPageVisible to Page

third_party/WebKit/Source/core/animation/CompositorPendingAnimations.cpp

 /*
  * 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:
  *
  *     * 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
@@ skipping 31 matching lines @@
 void CompositorPendingAnimations::add(Animation* animation)
 {
     ASSERT(animation);
     ASSERT(m_pending.find(animation) == kNotFound);
     m_pending.append(animation);
 
     Document* document = animation->timeline()->document();
     if (document->view())
         document->view()->scheduleAnimation();
 
-    bool visible = document->page() && document->page()->visibilityState() == PageVisibilityStateVisible;
+    bool visible = document->page() && document->page()->isPageVisible();
     if (!visible && !m_timer.isActive()) {
         m_timer.startOneShot(0, BLINK_FROM_HERE);
     }
 }
 
 bool CompositorPendingAnimations::update(bool startOnCompositor)
 {
     HeapVector<Member<Animation>> waitingForStartTime;
     bool startedSynchronizedOnCompositor = false;
 
@@ skipping 92 matching lines @@
 
 }
 
 DEFINE_TRACE(CompositorPendingAnimations)
 {
     visitor->trace(m_pending);
     visitor->trace(m_waitingForCompositorAnimationStart);
 }
 
 } // namespace blink