Add CSS image-orientation: from-image

Source/core/css/ComputedStyleCSSValueMapping.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ skipping 1733 matching lines @@
     case CSSPropertyWebkitHighlight:
         if (style.highlight() == nullAtom)
             return cssValuePool().createIdentifierValue(CSSValueNone);
         return cssValuePool().createValue(style.highlight(), CSSPrimitiveValue::CSS_STRING);
     case CSSPropertyWebkitHyphenateCharacter:
         if (style.hyphenationString().isNull())
             return cssValuePool().createIdentifierValue(CSSValueAuto);
         return cssValuePool().createValue(style.hyphenationString(), CSSPrimitiveValue::CSS_STRING);
     case CSSPropertyImageRendering:
         return CSSPrimitiveValue::create(style.imageRendering());
+    case CSSPropertyImageOrientation:
+        if (style.respectImageOrientation() == RespectImageOrientation)
+            return cssValuePool().createValue(CSSValueFromImage);
+        return cssValuePool().createValue(0, CSSPrimitiveValue::CSS_DEG);
     case CSSPropertyIsolation:
         return cssValuePool().createValue(style.isolation());
     case CSSPropertyJustifyItems:
         return valueForItemPositionWithOverflowAlignment(resolveAlignmentAuto(style.justifyItemsPosition(), styledNode), style.justifyItemsOverflowAlignment(), style.justifyItemsPositionType());
     case CSSPropertyJustifySelf:
         return valueForItemPositionWithOverflowAlignment(resolveAlignmentAuto(style.justifySelfPosition(), styledNode->parentNode()), style.justifySelfOverflowAlignment(), NonLegacyPosition);
     case CSSPropertyLeft:
         return valueForPositionOffset(style, CSSPropertyLeft, layoutObject);
     case CSSPropertyLetterSpacing:
         if (!style.letterSpacing())
@@ skipping 878 matching lines @@
     case CSSPropertyAll:
         return nullptr;
     default:
         break;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 }