Don't let rounding prematurely influence document size when printing

third_party/WebKit/Source/core/dom/Document.h

 /*
  * 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, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 443 matching lines @@
     PassRefPtr<ComputedStyle> styleForElementIgnoringPendingStylesheets(Element*);
     PassRefPtr<ComputedStyle> styleForPage(int pageIndex);
 
     // Returns true if page box (margin boxes and page borders) is visible.
     bool isPageBoxVisible(int pageIndex);
 
     // Returns the preferred page size and margins in pixels, assuming 96
     // pixels per inch. pageSize, marginTop, marginRight, marginBottom,
     // marginLeft must be initialized to the default values that are used if
     // auto is specified.
-    void pageSizeAndMarginsInPixels(int pageIndex, IntSize& pageSize, int& marginTop, int& marginRight, int& marginBottom, int& marginLeft);
+    void pageSizeAndMarginsInPixels(int pageIndex, DoubleSize& pageSize, int& marginTop, int& marginRight, int& marginBottom, int& marginLeft);

[esprehn, 2016/07/22 17:03:08]

Does this file include DoubleSize.h ?

 
     ResourceFetcher* fetcher() { return m_fetcher.get(); }
 
     void attach(const AttachContext& = AttachContext()) override;
     void detach(const AttachContext& = AttachContext()) override;
 
     // If you have a Document, use layoutView() instead which is faster.
     void layoutObject() const = delete;
 
     LayoutView* layoutView() const { return m_layoutView; }
@@ skipping 983 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h