[Presentation API] Use connection proxy to change connection state to 'closed'

third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp

Index: third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp
diff --git a/third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp b/third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp
index 8de73c9597708d1eab3610dcf2aebe3f174800d2..b6f1391467e6a29e960c640dbba4f498b2293b13 100644
--- a/third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp
+++ b/third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp
@@ -163,8 +163,6 @@ PresentationConnection::~PresentationConnection() {
 void PresentationConnection::bindProxy(
     std::unique_ptr<WebPresentationConnectionProxy> proxy) {
   DCHECK(proxy);
-  // TODO(zhaobin): Restore to DCHECK(!m_proxy) when reconnect() is properly
-  // implemented.
   m_proxy = std::move(proxy);
 }
 
@@ -402,7 +400,7 @@ void PresentationConnection::close() {
   }
   WebPresentationClient* client = presentationClient(getExecutionContext());
   if (client)
-    client->closeSession(m_url, m_id);
+    client->closeSession(m_url, m_id, m_proxy.get());
 
   tearDown();
 }