Move viewport unit resolution to style recalc time

Source/core/html/HTMLMetaElement-in.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 159 matching lines @@
 {
     // 1) Non-negative number values are translated to px lengths.
     // 2) Negative number values are translated to auto.
     // 3) device-width and device-height are used as keywords.
     // 4) Other keywords and unknown values translate to 0.0.
 
     unsigned length = valueString.length();
     DEFINE_ARRAY_FOR_MATCHING(characters, valueString, 13);
     SWITCH(characters, length) {
         CASE("device-width") {
-            return Length(100, ViewportPercentageWidth);
+            return Length(DeviceWidth);

[kenneth.r.christiansen, 2013/12/16 10:08:19]

Why are you making this change? It is legacy, and the @viewport refers to 100%
of the initial viewport. And on Android the initial viewport should be equal to
the entire screen (as the chrome disappears when scrolling)

         }
         CASE("device-height") {
-            return Length(100, ViewportPercentageHeight);
+            return Length(DeviceHeight);
         }
     }
 
     float value = parsePositiveNumber(keyString, valueString);
 
     if (value < 0)
         return Length(); // auto
 
     return Length(clampLengthValue(value), Fixed);
 }
@@ skipping 286 matching lines @@
 {
     return getAttribute(http_equivAttr);
 }
 
 const AtomicString& HTMLMetaElement::name() const
 {
     return getNameAttribute();
 }
 
 }