Recalc style or reattach when adding or removing the audio controls attribute

Source/core/html/HTMLAudioElement.cpp

 /*
  * Copyright (C) 2007, 2010, 2011, 2012, 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 39 matching lines @@
 {
     RefPtrWillBeRawPtr<HTMLAudioElement> audio = adoptRefWillBeNoop(new HTMLAudioElement(document));
     audio->ensureUserAgentShadowRoot();
     audio->setPreload(AtomicString("auto", AtomicString::ConstructFromLiteral));
     if (!src.isNull())
         audio->setSrc(src);
     audio->suspendIfNeeded();
     return audio.release();
 }
 
+bool HTMLAudioElement::layoutObjectIsNeeded(const ComputedStyle& style)
+{
+    return shouldShowControls() && HTMLMediaElement::layoutObjectIsNeeded(style);
 }
+
+void HTMLAudioElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
+{
+    if (name == controlsAttr) {
+        if (value.isNull())
+            lazyReattachIfAttached();
+        else
+            setNeedsStyleRecalc(LocalStyleChange, StyleChangeReasonForTracing::fromAttribute(name));
+    }
+
+    HTMLMediaElement::parseAttribute(name, value);
+}
+
+}