Include viewport visibility checks for autoplay experiment.

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 1074 matching lines @@
 
 #if ENABLE(ASSERT)
     layoutView()->assertSubtreeClearedPaintInvalidationState();
 #endif
 
     if (m_frame->selection().isCaretBoundsDirty())
         m_frame->selection().invalidateCaretRect();
 
     m_doFullPaintInvalidation = false;
     lifecycle().advanceTo(DocumentLifecycle::PaintInvalidationClean);
+
+    // Temporary callback for crbug.com/487345,402044
+    // TODO(ojan): Make this more general to be used by PositionObserver
+    // and rAF throttling.
+    IntRect visibleRect = rootFrameToContents(computeVisibleArea());
+    rootForPaintInvalidation.sendMediaPositionChangeNotifications(visibleRect);
+}
+
+IntRect FrameView::computeVisibleArea()
+{
+    // Return our clipping bounds in the root frame.
+    IntRect us(frameRect());
+    if (FrameView* parent = parentFrameView()) {
+        us = parent->contentsToRootFrame(us);
+        IntRect parentRect = parent->computeVisibleArea();
+        if (parentRect.isEmpty())
+            return IntRect();
+
+        us.intersect(parentRect);
+    }
+
+    return us;
 }
 
 DocumentLifecycle& FrameView::lifecycle() const
 {
     return m_frame->document()->lifecycle();
 }
 
 LayoutBox* FrameView::embeddedContentBox() const
 {
     LayoutView* layoutView = this->layoutView();
@@ skipping 2953 matching lines @@
 }
 
 bool FrameView::canThrottleRendering() const
 {
     if (!RuntimeEnabledFeatures::renderingPipelineThrottlingEnabled())
         return false;
     return m_hiddenForThrottling && m_crossOriginForThrottling;
 }
 
 } // namespace blink