BrowserPlugin/WebView - Move plugin lifetime to DOM

Source/core/frame/Frame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 461 matching lines @@
     frameView->setScrollbarModes(horizontalScrollbarMode, verticalScrollbarMode, horizontalLock, verticalLock);
 
     setView(frameView);
 
     if (backgroundColor.isValid())
         frameView->updateBackgroundRecursively(backgroundColor, transparent);
 
     if (isMainFrame)
         frameView->setParentVisible(true);
 
-    if (ownerRenderer())
-        ownerRenderer()->setWidget(frameView);
-
-    if (HTMLFrameOwnerElement* owner = ownerElement())
+    if (HTMLFrameOwnerElement* owner = ownerElement()) {
+        if (ownerRenderer())
+            owner->setWidget(frameView);
         view()->setCanHaveScrollbars(owner->scrollingMode() != ScrollbarAlwaysOff);
+    }
 }
 
 String Frame::layerTreeAsText(unsigned flags) const
 {
     document()->updateLayout();
 
     if (!contentRenderer())
         return String();
 
     return contentRenderer()->compositor()->layerTreeAsText(static_cast<LayerTreeFlags>(flags));
@@ skipping 198 matching lines @@
     if (!m_page)
         return 0;
 
     double ratio = m_page->deviceScaleFactor();
     if (RuntimeEnabledFeatures::devicePixelRatioIncludesZoomEnabled())
         ratio *= pageZoomFactor();
     return ratio;
 }
 
 } // namespace WebCore