Make the constructor of a LayoutRect from an IntRect explicit.

Source/core/dom/Document.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, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 5144 matching lines @@
     if (!node)
         node = doc->documentElement();
     return node;
 }
 
 void Document::adjustFloatQuadsForScrollAndAbsoluteZoom(Vector<FloatQuad>& quads, LayoutObject& renderer)
 {
     if (!view())
         return;
 
-    LayoutRect visibleContentRect = view()->visualViewportRect();
+    LayoutRect visibleContentRect(view()->visualViewportRect());
     for (size_t i = 0; i < quads.size(); ++i) {
         quads[i].move(-FloatSize(visibleContentRect.x().toFloat(), visibleContentRect.y().toFloat()));
         adjustFloatQuadForAbsoluteZoom(quads[i], renderer);
     }
 }
 
 void Document::adjustFloatRectForScrollAndAbsoluteZoom(FloatRect& rect, LayoutObject& renderer)
 {
     if (!view())
         return;
 
-    LayoutRect visibleContentRect = view()->visualViewportRect();
+    LayoutRect visibleContentRect(view()->visualViewportRect());
     rect.move(-FloatSize(visibleContentRect.x().toFloat(), visibleContentRect.y().toFloat()));
     adjustFloatRectForAbsoluteZoom(rect, renderer);
 }
 
 bool Document::hasActiveParser()
 {
     return m_activeParserCount || (m_parser && m_parser->processingData());
 }
 
 void Document::setContextFeatures(ContextFeatures& features)
@@ skipping 533 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif