Move viewport unit resolution to style recalc time

Source/core/dom/ViewportDescription.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, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2012-2013 Intel Corporation. All rights reserved.
  *
@@ skipping 36 matching lines @@
 {
     if (length.isAuto())
         return ViewportDescription::ValueAuto;
 
     if (length.isFixed())
         return length.getFloatValue();
 
     if (length.type() == ExtendToZoom)
         return ViewportDescription::ValueExtendToZoom;
 
-    if ((length.type() == Percent && direction == Horizontal) || length.type() == ViewportPercentageWidth)
+    if (length.type() == Percent && direction == Horizontal)
         return initialViewportSize.width() * length.getFloatValue() / 100.0f;
 
-    if ((length.type() == Percent && direction == Vertical) || length.type() == ViewportPercentageHeight)
+    if (length.type() == Percent && direction == Vertical)
         return initialViewportSize.height() * length.getFloatValue() / 100.0f;
 
-    if (length.type() == ViewportPercentageMin)
-        return min(initialViewportSize.width(), initialViewportSize.height()) * length.viewportPercentageLength() / 100.0f;
+    if (length.type() == DeviceWidth)
+        return initialViewportSize.width();
 
-    if (length.type() == ViewportPercentageMax)
-        return max(initialViewportSize.width(), initialViewportSize.height()) * length.viewportPercentageLength() / 100.0f;
+    if (length.type() == DeviceHeight)
+        return initialViewportSize.height();
 
     ASSERT_NOT_REACHED();
     return ViewportDescription::ValueAuto;
 }
 
 PageScaleConstraints ViewportDescription::resolve(const FloatSize& initialViewportSize) const
 {
     float resultWidth = ValueAuto;
     float resultMaxWidth = resolveViewportLength(maxWidth, initialViewportSize, Horizontal);
     float resultMinWidth = resolveViewportLength(minWidth, initialViewportSize, Horizontal);
@@ skipping 92 matching lines @@
     PageScaleConstraints result;
     result.minimumScale = resultMinZoom;
     result.maximumScale = resultMaxZoom;
     result.initialScale = resultZoom;
     result.layoutSize.setWidth(resultWidth);
     result.layoutSize.setHeight(resultHeight);
     return result;
 }
 
 } // namespace WebCore