Support subtitles for native fullscreen video

Source/core/rendering/RenderView.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 1162 matching lines @@
     return std::min(viewLogicalWidth(ScrollableArea::IncludeScrollbars), viewLogicalHeight(ScrollableArea::IncludeScrollbars))
         * percentage / 100.f;
 }
 
 LayoutUnit RenderView::viewportPercentageMax(float percentage) const
 {
     return std::max(viewLogicalWidth(ScrollableArea::IncludeScrollbars), viewLogicalHeight(ScrollableArea::IncludeScrollbars))
         * percentage / 100.f;
 }
 
+void RenderView::setCurrentFullscreenRenderer(RenderObject* renderer)
+{
+    compositor()->setCurrentFullscreenRenderer(renderer);
+}
+
 FragmentationDisabler::FragmentationDisabler(RenderObject* root)
 {
     RenderView* renderView = root->view();
     ASSERT(renderView);
 
     LayoutState* layoutState = renderView->layoutState();
 
     m_root = root;
     m_fragmenting = layoutState && layoutState->isPaginated();
     m_flowThreadState = m_root->flowThreadState();
@@ skipping 19 matching lines @@
 #endif
 
     if (layoutState)
         layoutState->m_isPaginated = m_fragmenting;
 
     if (m_flowThreadState != RenderObject::NotInsideFlowThread)
         m_root->setFlowThreadStateIncludingDescendants(m_flowThreadState);
 }
 
 } // namespace WebCore