Simplify TouchAction enum to be a simple bit flag

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 694 matching lines @@
         return cssValuePool().createIdentifierValue(CSSValueWavy);
     }
 
     ASSERT_NOT_REACHED();
     return cssValuePool().createExplicitInitialValue();
 }
 
 static PassRefPtrWillBeRawPtr<CSSValue> touchActionFlagsToCSSValue(TouchAction touchAction)
 {
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
-    if (touchAction == TouchActionAuto)
+    if (touchAction == TouchActionAuto) {
         list->append(cssValuePool().createIdentifierValue(CSSValueAuto));
-    if (touchAction & TouchActionNone) {
-        ASSERT(touchAction == TouchActionNone);
+    } else if (touchAction == TouchActionNone) {
         list->append(cssValuePool().createIdentifierValue(CSSValueNone));
-    }
-    if (touchAction == (TouchActionPanX | TouchActionPanY | TouchActionPinchZoom)) {
+    } else if (touchAction == TouchActionManipulation) {
         list->append(cssValuePool().createIdentifierValue(CSSValueManipulation));
     } else {
         if ((touchAction & TouchActionPanX) == TouchActionPanX)
             list->append(cssValuePool().createIdentifierValue(CSSValuePanX));
         else if (touchAction & TouchActionPanLeft)
             list->append(cssValuePool().createIdentifierValue(CSSValuePanLeft));
         else if (touchAction & TouchActionPanRight)
             list->append(cssValuePool().createIdentifierValue(CSSValuePanRight));
 
         if ((touchAction & TouchActionPanY) == TouchActionPanY)
@@ skipping 1956 matching lines @@
     case CSSPropertyAll:
         return nullptr;
     default:
         break;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 }