Remove the "horizontal-bt" value from -webkit-writing-mode

third_party/WebKit/Source/core/css/CSSProperty.cpp

 /**
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 38 matching lines @@
 
 static CSSPropertyID resolveToPhysicalProperty(TextDirection direction, WritingMode writingMode, LogicalBoxSide logicalSide, const StylePropertyShorthand& shorthand)
 {
     if (direction == LTR) {
         if (writingMode == TopToBottomWritingMode) {
             // The common case. The logical and physical box sides match.
             // Left = Start, Right = End, Before = Top, After = Bottom
             return shorthand.properties()[logicalSide];
         }
 
-        if (writingMode == BottomToTopWritingMode) {
-            // Start = Left, End = Right, Before = Bottom, After = Top.
-            switch (logicalSide) {
-            case StartSide:
-                return shorthand.properties()[LeftSide];
-            case EndSide:
-                return shorthand.properties()[RightSide];
-            case BeforeSide:
-                return shorthand.properties()[BottomSide];
-            default:
-                return shorthand.properties()[TopSide];
-            }
-        }
-
         if (writingMode == LeftToRightWritingMode) {
             // Start = Top, End = Bottom, Before = Left, After = Right.
             switch (logicalSide) {
             case StartSide:
                 return shorthand.properties()[TopSide];
             case EndSide:
                 return shorthand.properties()[BottomSide];
             case BeforeSide:
                 return shorthand.properties()[LeftSide];
             default:
@@ skipping 21 matching lines @@
             return shorthand.properties()[RightSide];
         case EndSide:
             return shorthand.properties()[LeftSide];
         case BeforeSide:
             return shorthand.properties()[TopSide];
         default:
             return shorthand.properties()[BottomSide];
         }
     }
 
-    if (writingMode == BottomToTopWritingMode) {
-        // Start = Right, End = Left, Before = Bottom, After = Top
-        switch (logicalSide) {
-        case StartSide:
-            return shorthand.properties()[RightSide];
-        case EndSide:
-            return shorthand.properties()[LeftSide];
-        case BeforeSide:
-            return shorthand.properties()[BottomSide];
-        default:
-            return shorthand.properties()[TopSide];
-        }
-    }
-
     if (writingMode == LeftToRightWritingMode) {
         // Start = Bottom, End = Top, Before = Left, After = Right
         switch (logicalSide) {
         case StartSide:
             return shorthand.properties()[BottomSide];
         case EndSide:
             return shorthand.properties()[TopSide];
         case BeforeSide:
             return shorthand.properties()[LeftSide];
         default:
@@ skipping 11 matching lines @@
         return shorthand.properties()[RightSide];
     default:
         return shorthand.properties()[LeftSide];
     }
 }
 
 enum LogicalExtent { LogicalWidth, LogicalHeight };
 
 static CSSPropertyID resolveToPhysicalProperty(WritingMode writingMode, LogicalExtent logicalSide, const CSSPropertyID* properties)
 {
-    if (writingMode == TopToBottomWritingMode || writingMode == BottomToTopWritingMode)
+    if (isHorizontalWritingMode(writingMode))
         return properties[logicalSide];
     return logicalSide == LogicalWidth ? properties[1] : properties[0];
 }
 
 static const StylePropertyShorthand& borderDirections()
 {
     static const CSSPropertyID properties[4] = { CSSPropertyBorderTop, CSSPropertyBorderRight, CSSPropertyBorderBottom, CSSPropertyBorderLeft };
     DEFINE_STATIC_LOCAL(StylePropertyShorthand, borderDirections, (CSSPropertyBorder, properties, WTF_ARRAY_LENGTH(properties)));
     return borderDirections;
 }
@@ skipping 94 matching lines @@
     // affected by all property.
     return propertyID != CSSPropertyUnicodeBidi && propertyID != CSSPropertyDirection;
 }
 
 bool CSSProperty::operator==(const CSSProperty& other) const
 {
     return m_value->equals(*other.m_value) && isImportant() == other.isImportant();
 }
 
 } // namespace blink