Don't let rounding prematurely influence document size when printing

third_party/WebKit/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 1976 matching lines @@
 {
     updateDistribution();
     return ensureStyleResolver().styleForPage(pageIndex);
 }
 
 bool Document::isPageBoxVisible(int pageIndex)
 {
     return styleForPage(pageIndex)->visibility() != HIDDEN; // display property doesn't apply to @page.
 }
 
-void Document::pageSizeAndMarginsInPixels(int pageIndex, IntSize& pageSize, int& marginTop, int& marginRight, int& marginBottom, int& marginLeft)
+void Document::pageSizeAndMarginsInPixels(int pageIndex, FloatSize& pageSize, int& marginTop, int& marginRight, int& marginBottom, int& marginLeft)
 {
     RefPtr<ComputedStyle> style = styleForPage(pageIndex);
 
-    int width = pageSize.width();
-    int height = pageSize.height();
+    float width = pageSize.width();
+    float height = pageSize.height();
     switch (style->getPageSizeType()) {
     case PAGE_SIZE_AUTO:
         break;
     case PAGE_SIZE_AUTO_LANDSCAPE:
         if (width < height)
             std::swap(width, height);
         break;
     case PAGE_SIZE_AUTO_PORTRAIT:
         if (width > height)
             std::swap(width, height);
         break;
     case PAGE_SIZE_RESOLVED: {
         FloatSize size = style->pageSize();
         width = size.width();
         height = size.height();
         break;
     }
     default:
         ASSERT_NOT_REACHED();
     }
-    pageSize = IntSize(width, height);
+    pageSize = FloatSize(width, height);
 
     // The percentage is calculated with respect to the width even for margin top and bottom.
     // http://www.w3.org/TR/CSS2/box.html#margin-properties
     marginTop = style->marginTop().isAuto() ? marginTop : intValueForLength(style->marginTop(), width);
     marginRight = style->marginRight().isAuto() ? marginRight : intValueForLength(style->marginRight(), width);
     marginBottom = style->marginBottom().isAuto() ? marginBottom : intValueForLength(style->marginBottom(), width);
     marginLeft = style->marginLeft().isAuto() ? marginLeft : intValueForLength(style->marginLeft(), width);
 }
 
 void Document::setIsViewSource(bool isViewSource)
@@ skipping 3988 matching lines @@
 }
 
 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().getString().utf8().data());
 }
 #endif