Revert of Remove scoped styles.

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 555 matching lines @@
 
     String representation = externalRepresentation(element);
     if (representation.isEmpty()) {
         exceptionState.throwDOMException(InvalidAccessError, "The element provided has no external representation.");
         return String();
     }
 
     return representation;
 }
 
+size_t Internals::numberOfScopedHTMLStyleChildren(const Node* scope, ExceptionState& exceptionState) const
+{
+    if (scope && (scope->isElementNode() || scope->isShadowRoot()))
+        return scope->numberOfScopedHTMLStyleChildren();
+
+    exceptionState.throwDOMException(InvalidAccessError, ExceptionMessages::argumentNullOrIncorrectType(1, "Node"));
+    return 0;
+}
+
 PassRefPtrWillBeRawPtr<CSSComputedStyleDeclaration> Internals::computedStyleIncludingVisitedInfo(Node* node, ExceptionState& exceptionState) const
 {
     if (!node) {
         exceptionState.throwDOMException(InvalidAccessError, ExceptionMessages::argumentNullOrIncorrectType(1, "Node"));
         return nullptr;
     }
 
     bool allowVisitedStyle = true;
     return CSSComputedStyleDeclaration::create(node, allowVisitedStyle);
 }
@@ skipping 1773 matching lines @@
     } else if (type == "none") {
         webtype = blink::ConnectionTypeNone;
     } else {
         exceptionState.throwDOMException(NotFoundError, ExceptionMessages::failedToEnumerate("connection type", type));
         return;
     }
     networkStateNotifier().setWebConnectionTypeForTest(webtype);
 }
 
 } // namespace WebCore