Implement direction-specific touch-action values (blink side)

Source/core/css/ComputedStyleCSSValueMapping.cpp

Index: Source/core/css/ComputedStyleCSSValueMapping.cpp
diff --git a/Source/core/css/ComputedStyleCSSValueMapping.cpp b/Source/core/css/ComputedStyleCSSValueMapping.cpp
index 164782ced0c591e766a7a262278a5a72aa205d4e..4a2d5d1edc25064a330ea9a71c38bd9b3201bac4 100644
--- a/Source/core/css/ComputedStyleCSSValueMapping.cpp
+++ b/Source/core/css/ComputedStyleCSSValueMapping.cpp
@@ -715,10 +715,19 @@ static PassRefPtrWillBeRawPtr<CSSValue> touchActionFlagsToCSSValue(TouchAction t
     if (touchAction == (TouchActionPanX | TouchActionPanY | TouchActionPinchZoom)) {
         list->append(cssValuePool().createIdentifierValue(CSSValueManipulation));
     } else {
-        if (touchAction & TouchActionPanX)
+        if ((touchAction & TouchActionPanX) == TouchActionPanX)
             list->append(cssValuePool().createIdentifierValue(CSSValuePanX));
-        if (touchAction & TouchActionPanY)
+        else if (touchAction & TouchActionPanLeft)
+            list->append(cssValuePool().createIdentifierValue(CSSValuePanLeft));
+        else if (touchAction & TouchActionPanRight)
+            list->append(cssValuePool().createIdentifierValue(CSSValuePanRight));
+
+        if ((touchAction & TouchActionPanY) == TouchActionPanY)
             list->append(cssValuePool().createIdentifierValue(CSSValuePanY));
+        else if (touchAction & TouchActionPanUp)
+            list->append(cssValuePool().createIdentifierValue(CSSValuePanUp));
+        else if (touchAction & TouchActionPanDown)
+            list->append(cssValuePool().createIdentifierValue(CSSValuePanDown));
     }
     ASSERT(list->length());
     return list.release();