Remove MediaQueryList listener from removed HTMLSourceElement.

third_party/WebKit/Source/core/html/HTMLSourceElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLSourceElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLSourceElement.cpp b/third_party/WebKit/Source/core/html/HTMLSourceElement.cpp
index 3029e047d4cd43371e70cddc64ab9c4da667a6cf..8fdc44aa70e2fdb5c20089e38097a46e142d2dee 100644
--- a/third_party/WebKit/Source/core/html/HTMLSourceElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLSourceElement.cpp
@@ -115,11 +115,20 @@ void HTMLSourceElement::removedFrom(ContainerNode* removalRoot)
         parent = toElement(removalRoot);
     if (isHTMLMediaElement(parent))
         toHTMLMediaElement(parent)->sourceWasRemoved(this);
-    if (isHTMLPictureElement(parent))
+    if (isHTMLPictureElement(parent)) {
+        if (m_mediaQueryList)
+            m_mediaQueryList->removeListener(m_listener);
         toHTMLPictureElement(parent)->sourceOrMediaChanged();
+    }
     HTMLElement::removedFrom(removalRoot);
 }
 
+void HTMLSourceElement::notifyImgSiblingRemoved()
+{
+    if (m_mediaQueryList)
+        m_mediaQueryList->removeListener(m_listener);
+}
+
 void HTMLSourceElement::setSrc(const String& url)
 {
     setAttribute(srcAttr, AtomicString(url));