Make the constructor of a LayoutRect from an IntRect explicit.

Source/core/dom/DocumentMarkerController.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 106 matching lines @@
         unsigned startOffset = markedText.startOffset();
         unsigned endOffset = markedText.endOffset();
         addMarker(markedText.startContainer(), DocumentMarker(startOffset, endOffset, activeMatch));
         if (endOffset > startOffset) {
             // Rendered rects for markers in WebKit are not populated until each time
             // the markers are painted. However, we need it to happen sooner, because
             // the whole purpose of tickmarks on the scrollbar is to show where
             // matches off-screen are (that haven't been painted yet).
             Node* node = markedText.startContainer();
             DocumentMarkerVector markers = markersFor(node);
-            toRenderedDocumentMarker(markers[markers.size() - 1])->setRenderedRect(range->boundingBox());
+            toRenderedDocumentMarker(markers[markers.size() - 1])->setRenderedRect(LayoutRect(range->boundingBox()));
         }
     }
 }
 
 void DocumentMarkerController::prepareForDestruction()
 {
     clear();
 }
 
 void DocumentMarkerController::removeMarkers(TextIterator& markedText, DocumentMarker::MarkerTypes markerTypes, RemovePartiallyOverlappingMarkerOrNot shouldRemovePartiallyOverlappingMarker)
@@ skipping 591 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 void showDocumentMarkers(const blink::DocumentMarkerController* controller)
 {
     if (controller)
         controller->showMarkers();
 }
 #endif