Specialize base::IsWeakReceiver for Blink weak pointers to support base::Bind (1/5)

third_party/WebKit/Source/core/dom/ElementVisibilityObserver.cpp

Index: third_party/WebKit/Source/core/dom/ElementVisibilityObserver.cpp
diff --git a/third_party/WebKit/Source/core/dom/ElementVisibilityObserver.cpp b/third_party/WebKit/Source/core/dom/ElementVisibilityObserver.cpp
index 5f1b1d14c3b8b114e12f756bed8e3470ce8efdef..d8510e5b2f3c89ce163f74f4c6119939b50853c5 100644
--- a/third_party/WebKit/Source/core/dom/ElementVisibilityObserver.cpp
+++ b/third_party/WebKit/Source/core/dom/ElementVisibilityObserver.cpp
@@ -23,7 +23,7 @@ void ElementVisibilityObserver::start()
     DCHECK(!m_intersectionObserver);
     m_intersectionObserver = IntersectionObserver::create(
         Vector<Length>(), Vector<float>({std::numeric_limits<float>::min()}), &m_element->document(),
-        WTF::bind(&ElementVisibilityObserver::onVisibilityChanged, WeakPersistentThisPointer<ElementVisibilityObserver>(this)));
+        WTF::bind(&ElementVisibilityObserver::onVisibilityChanged, wrapWeakPersistent(this)));
     DCHECK(m_intersectionObserver);
     m_intersectionObserver->observe(m_element);
 }