Make ElementShadow::youngestShadowRoot() return a reference

third_party/WebKit/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 639 matching lines @@
 {
     // FIXME: Internals::shadowRoot() in tests should be converted to youngestShadowRoot() or oldestShadowRoot().
     // https://bugs.webkit.org/show_bug.cgi?id=78465
     return youngestShadowRoot(host);
 }
 
 ShadowRoot* Internals::youngestShadowRoot(Element* host)
 {
     ASSERT(host);
     if (ElementShadow* shadow = host->shadow())
-        return shadow->youngestShadowRoot();
+        return &shadow->youngestShadowRoot();
     return 0;
 }
 
 ShadowRoot* Internals::oldestShadowRoot(Element* host)
 {
     ASSERT(host);
     if (ElementShadow* shadow = host->shadow())
         return shadow->oldestShadowRoot();
     return 0;
 }
@@ skipping 1864 matching lines @@
     Document* document = contextDocument();
     if (!document) {
         exceptionState.throwDOMException(InvalidAccessError, "No context document is available.");
         return 0;
     }
 
     return document->loader()->timing().monotonicTimeToZeroBasedDocumentTime(platformTime);
 }
 
 } // namespace blink