scheduler: Re-enable timer throttling for hidden frames

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 4559 matching lines @@
       layoutViewItem.invalidatePaintForViewAndCompositedLayers();
   }
 
   bool hasHandlers = m_frame->host() &&
                      m_frame->host()->eventHandlerRegistry().hasEventHandlers(
                          EventHandlerRegistry::TouchStartOrMoveEventBlocking);
   if (wasThrottled != canThrottleRendering() && scrollingCoordinator &&
       hasHandlers)
     scrollingCoordinator->touchEventTargetRectsDidChange();
 
+  if (m_frame->frameScheduler()) {
+    m_frame->frameScheduler()->setFrameVisible(!m_hiddenForThrottling);
+    m_frame->frameScheduler()->setCrossOrigin(m_frame->isCrossOriginSubframe());
+  }
+
 #if DCHECK_IS_ON()
   // Make sure we never have an unthrottled frame inside a throttled one.
   FrameView* parent = parentFrameView();
   while (parent) {
     DCHECK(canThrottleRendering() || !parent->canThrottleRendering());
     parent = parent->parentFrameView();
   }
 #endif
 }
 
@@ skipping 79 matching lines @@
   DCHECK(m_frame->isMainFrame());
   return m_initialViewportSize.width();
 }
 
 int FrameView::initialViewportHeight() const {
   DCHECK(m_frame->isMainFrame());
   return m_initialViewportSize.height();
 }
 
 }  // namespace blink