(NOT FOR COMMIT) Testing layer invalidation speedups.

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 1087 matching lines @@
     if (!m_frame->settings() || !m_frame->settings()->rootLayerScrolls())
         invalidatePaintOfScrollControlsIfNeeded(paintInvalidationState);
 
 #if ENABLE(ASSERT)
     layoutView()->assertSubtreeClearedPaintInvalidationFlags();
 #endif
 
     if (m_frame->selection().isCaretBoundsDirty())
         m_frame->selection().invalidateCaretRect();
 
+    rootForPaintInvalidation.compositor()->finalizeInvalidations();
+
     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);
 }
 
@@ skipping 2988 matching lines @@
     return m_subtreeThrottled || (m_hiddenForThrottling && m_crossOriginForThrottling);
 }
 
 LayoutBox& FrameView::boxForScrollControlPaintInvalidation() const
 {
     ASSERT(layoutView());
     return *layoutView();
 }
 
 } // namespace blink