[Experimental] Supporting OOPIF printing

third_party/WebKit/Source/core/frame/LocalFrame.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>
@@ skipping 596 matching lines @@
     view()->setSubtreeNeedsPaintPropertyUpdate();
 
   if (!printing)
     document()->setPrinting(Document::NotPrinting);
 }
 
 bool LocalFrame::shouldUsePrintingLayout() const {
   // Only top frame being printed should be fit to page size.
   // Subframes should be constrained by parents only.
   return document()->printing() &&
-         (!tree().parent() || !tree().parent()->isLocalFrame() ||
-          !toLocalFrame(tree().parent())->document()->printing());
+         (!tree().parent() ||
+          (tree().parent()->isLocalFrame() &&
+           !toLocalFrame(tree().parent())->document()->printing()));
 }
 
 FloatSize LocalFrame::resizePageRectsKeepingRatio(
     const FloatSize& originalSize,
     const FloatSize& expectedSize) {
   FloatSize resultSize;
   if (contentLayoutItem().isNull())
     return FloatSize();
 
   if (contentLayoutItem().style()->isHorizontalWritingMode()) {
@@ skipping 309 matching lines @@
   if (m_frame && m_frame->client() && m_frame->client()->frameBlameContext())
     m_frame->client()->frameBlameContext()->Enter();
 }
 
 ScopedFrameBlamer::~ScopedFrameBlamer() {
   if (m_frame && m_frame->client() && m_frame->client()->frameBlameContext())
     m_frame->client()->frameBlameContext()->Leave();
 }
 
 }  // namespace blink