Implement CSS: scroll-boundary-behavior

third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@nypop.com>.
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 3195 matching lines @@
     case CSSValueSmooth:
       return kScrollBehaviorSmooth;
     default:
       break;
   }
   NOTREACHED();
   return kScrollBehaviorAuto;
 }
 
 template <>
+inline CSSIdentifierValue::CSSIdentifierValue(
+    EScrollBoundaryBehavior boundary_behavior)
+    : CSSValue(kIdentifierClass) {
+  switch (boundary_behavior) {
+    case EScrollBoundaryBehavior::kAuto:
+      value_id_ = CSSValueAuto;
+      break;
+    case EScrollBoundaryBehavior::kContain:
+      value_id_ = CSSValueContain;
+      break;
+    case EScrollBoundaryBehavior::kNone:
+      value_id_ = CSSValueNone;
+      break;
+  }
+}
+
+template <>
+inline EScrollBoundaryBehavior CSSIdentifierValue::ConvertTo() const {
+  switch (GetValueID()) {
+    case CSSValueAuto:
+      return EScrollBoundaryBehavior::kAuto;
+    case CSSValueContain:
+      return EScrollBoundaryBehavior::kContain;
+    case CSSValueNone:
+      return EScrollBoundaryBehavior::kNone;
+    default:
+      break;
+  }
+  NOTREACHED();
+  return EScrollBoundaryBehavior::kAuto;
+}
+
+template <>
 inline CSSIdentifierValue::CSSIdentifierValue(ScrollSnapType snap_type)
     : CSSValue(kIdentifierClass) {
   switch (snap_type) {
     case kScrollSnapTypeNone:
       value_id_ = CSSValueNone;
       break;
     case kScrollSnapTypeMandatory:
       value_id_ = CSSValueMandatory;
       break;
     case kScrollSnapTypeProximity:
@@ skipping 66 matching lines @@
     default:
       break;
   }
   NOTREACHED();
   return kContainsNone;
 }
 
 }  // namespace blink
 
 #endif