Use initializer_lists for static WTF::HashSets.

third_party/WebKit/Source/core/dom/custom/CustomElement.cpp

 // Copyright 2016 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.
 
 #include "core/dom/custom/CustomElement.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/QualifiedName.h"
 #include "core/dom/custom/CEReactionsScope.h"
 #include "core/dom/custom/CustomElementDefinition.h"
@@ skipping 42 matching lines @@
             U16_NEXT(name.characters16(), i, name.length(), ch);
         if (ch == '-')
             hasHyphens = true;
         else if (!Character::isPotentialCustomElementNameChar(ch))
             return false;
     }
     if (!hasHyphens)
         return false;
 
     // https://html.spec.whatwg.org/multipage/scripting.html#valid-custom-element-name
-    DEFINE_STATIC_LOCAL(HashSet<AtomicString>, hyphenContainingElementNames, ());
-    if (hyphenContainingElementNames.isEmpty()) {
-        hyphenContainingElementNames.add("annotation-xml");
-        hyphenContainingElementNames.add("color-profile");
-        hyphenContainingElementNames.add("font-face");
-        hyphenContainingElementNames.add("font-face-src");
-        hyphenContainingElementNames.add("font-face-uri");
-        hyphenContainingElementNames.add("font-face-format");
-        hyphenContainingElementNames.add("font-face-name");
-        hyphenContainingElementNames.add("missing-glyph");
-    }
-
+    DEFINE_STATIC_LOCAL(HashSet<AtomicString>, hyphenContainingElementNames, ({
+        "annotation-xml",
+        "color-profile",
+        "font-face",
+        "font-face-src",
+        "font-face-uri",
+        "font-face-format",
+        "font-face-name",
+        "missing-glyph",
+    }));
     return !hyphenContainingElementNames.contains(name);
 }
 
 bool CustomElement::shouldCreateCustomElement(Document& document, const AtomicString& localName)
 {
     return RuntimeEnabledFeatures::customElementsV1Enabled()
         && document.frame() && isValidName(localName);
 }
 
 bool CustomElement::shouldCreateCustomElement(Document& document, const QualifiedName& tagName)
@@ skipping 132 matching lines @@
     CustomElementsRegistry* registry = CustomElement::registry(*element);
     if (!registry)
         return;
     if (CustomElementDefinition* definition = registry->definitionForName(element->localName()))
         definition->enqueueUpgradeReaction(element);
     else
         registry->addCandidate(element);
 }
 
 } // namespace blink