Add CSS parsing support for the scroll-blocks-on property (in place of touch-action-delay)

Source/core/css/CSSPrimitiveValueMappings.h

Index: Source/core/css/CSSPrimitiveValueMappings.h
diff --git a/Source/core/css/CSSPrimitiveValueMappings.h b/Source/core/css/CSSPrimitiveValueMappings.h
index 53cbbc8fb01f7a42d05f8e2aaab4dcd037f57b62..42e25438adef0d25ff0f235804846d2f8b998401 100644
--- a/Source/core/css/CSSPrimitiveValueMappings.h
+++ b/Source/core/css/CSSPrimitiveValueMappings.h
@@ -4465,33 +4465,23 @@ template<> inline CSSPrimitiveValue::operator EIsolation() const
     return IsolationAuto;
 }
 
-template<> inline CSSPrimitiveValue::CSSPrimitiveValue(TouchActionDelay t)
-    : CSSValue(PrimitiveClass)
-{
-    m_primitiveUnitType = CSS_VALUE_ID;
-    switch (t) {
-    case TouchActionDelayNone:
-        m_value.valueID = CSSValueNone;
-        break;
-    case TouchActionDelayScript:
-        m_value.valueID = CSSValueScript;
-        break;
-    }
-}
-
-template<> inline CSSPrimitiveValue::operator TouchActionDelay() const
+template<> inline CSSPrimitiveValue::operator ScrollBlocksOn() const
 {
     switch (m_value.valueID) {
     case CSSValueNone:
-        return TouchActionDelayNone;
-    case CSSValueScript:
-        return TouchActionDelayScript;
+        return ScrollBlocksOnNone;
+    case CSSValueStartTouch:
+        return ScrollBlocksOnStartTouch;
+    case CSSValueWheelEvent:
+        return ScrollBlocksOnWheelEvent;
+    case CSSValueScrollEvent:
+        return ScrollBlocksOnScrollEvent;
     default:
         break;
     }
 
     ASSERT_NOT_REACHED();
-    return TouchActionDelayNone;
+    return ScrollBlocksOnNone;
 }
 
 template<> inline CSSPrimitiveValue::CSSPrimitiveValue(CSSBoxType cssBox)