Make the constructor of a LayoutRect from an IntRect explicit.

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>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 659 matching lines @@
     m_view->setNodeToDraw(&node); // Enable special sub-tree drawing mode.
 
     // Document::updateLayout may have blown away the original LayoutObject.
     LayoutObject* renderer = node.renderer();
     if (!renderer)
         return nullptr;
 
     IntRect rect;
 
     return paintIntoDragImage(renderer->displayItemClient(), DisplayItem::ClipNodeImage, renderer->shouldRespectImageOrientation(),
-        pixelSnappedIntRect(renderer->paintingRootRect(rect)));
+        renderer->paintingRootRect(rect));
 }
 
 PassOwnPtr<DragImage> LocalFrame::dragImageForSelection()
 {
     if (!selection().isRange())
         return nullptr;
 
     const ScopedFramePaintingState state(this, 0);
     m_view->setPaintBehavior(PaintBehaviorSelectionOnly | PaintBehaviorFlattenCompositingLayers);
     m_view->updateLayoutAndStyleForPainting();
@@ skipping 152 matching lines @@
     // We detach the FrameView's custom scroll bars as early as
     // possible to prevent m_doc->detach() from messing with the view
     // such that its scroll bars won't be torn down.
     //
     // FIXME: We should revisit this.
     if (m_view)
         m_view->prepareForDetach();
 }
 
 } // namespace blink