Add support for touch-action: pinch-zoom.

third_party/WebKit/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 939 matching lines @@
         list->append(*CSSPrimitiveValue::createIdentifier(CSSValueNone));
     } else if (touchAction == TouchActionManipulation) {
         list->append(*CSSPrimitiveValue::createIdentifier(CSSValueManipulation));
     } else {
         if ((touchAction & TouchActionPanX) == TouchActionPanX)
             list->append(*CSSPrimitiveValue::createIdentifier(CSSValuePanX));
         else if (touchAction & TouchActionPanLeft)
             list->append(*CSSPrimitiveValue::createIdentifier(CSSValuePanLeft));
         else if (touchAction & TouchActionPanRight)
             list->append(*CSSPrimitiveValue::createIdentifier(CSSValuePanRight));
-
         if ((touchAction & TouchActionPanY) == TouchActionPanY)
             list->append(*CSSPrimitiveValue::createIdentifier(CSSValuePanY));
         else if (touchAction & TouchActionPanUp)
             list->append(*CSSPrimitiveValue::createIdentifier(CSSValuePanUp));
         else if (touchAction & TouchActionPanDown)
             list->append(*CSSPrimitiveValue::createIdentifier(CSSValuePanDown));
+
+        if ((touchAction & TouchActionPinchZoom) == TouchActionPinchZoom)
+            list->append(*CSSPrimitiveValue::createIdentifier(CSSValuePinchZoom));
     }
+
     ASSERT(list->length());
     return list;
 }
 
 static CSSValue* valueForWillChange(const Vector<CSSPropertyID>& willChangeProperties, bool willChangeContents, bool willChangeScrollPosition)
 {
     CSSValueList* list = CSSValueList::createCommaSeparated();
     if (willChangeContents)
         list->append(*CSSPrimitiveValue::createIdentifier(CSSValueContents));
     if (willChangeScrollPosition)
@@ skipping 2042 matching lines @@
     case CSSPropertyAll:
         return nullptr;
     default:
         break;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 } // namespace blink