Add Element.attachShadow under the ShadowDOMV1 runtime flag

third_party/WebKit/Source/core/frame/OriginsUsingFeatures.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef OriginsUsingFeatures_h
 #define OriginsUsingFeatures_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashMap.h"
@@ skipping 16 matching lines @@
     enum class Feature {
         ElementCreateShadowRoot,
         DocumentRegisterElement,
         EventPath,
         DeviceMotionInsecureOrigin,
         DeviceOrientationInsecureOrigin,
         FullscreenInsecureOrigin,
         GeolocationInsecureOrigin,
         GetUserMediaInsecureOrigin,
         GetUserMediaSecureOrigin,
+        ElementAttachShadow,
 
         NumberOfFeatures // This must be the last item.
     };
 
     static void countAnyWorld(Document&, Feature);
     static void countMainWorldOnly(const ScriptState*, Document&, Feature);
     static void countOriginOrIsolatedWorldHumanReadableName(const ScriptState*, EventTarget&, Feature);
 
     void documentDetached(Document&);
     void updateMeasurementsAndClear();
@@ skipping 25 matching lines @@
     void recordOriginsToRappor();
     void recordNamesToRappor();
 
     Vector<std::pair<String, OriginsUsingFeatures::Value>, 1> m_originAndValues;
     HashMap<String, OriginsUsingFeatures::Value> m_valueByName;
 };
 
 } // namespace blink
 
 #endif // OriginsUsingFeatures_h