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

Source/core/html/HTMLAudioElement.cpp

Index: Source/core/html/HTMLAudioElement.cpp
diff --git a/Source/core/html/HTMLAudioElement.cpp b/Source/core/html/HTMLAudioElement.cpp
index 6607ab47c103cd41df10c05bcee9e8ff76b21142..4ec5a3c1207f5a440ee843818843d9fc7499cbf5 100644
--- a/Source/core/html/HTMLAudioElement.cpp
+++ b/Source/core/html/HTMLAudioElement.cpp
@@ -57,4 +57,21 @@ PassRefPtrWillBeRawPtr<HTMLAudioElement> HTMLAudioElement::createForJSConstructo
     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);
+}
+
 }