[Presentation API] Add layout test for connection.close() and fix test failures

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PresentationConnection_h
 #define PresentationConnection_h
 
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/events/EventTarget.h"
 #include "core/fileapi/Blob.h"
@@ skipping 71 matching lines @@
   bool matches(const String& id, const KURL&) const;
 
   // Notifies the connection about its state change to 'closed'.
   void didClose(WebPresentationConnectionCloseReason, const String& message);
 
   // WebPresentationConnection implementation.
   void bindProxy(std::unique_ptr<WebPresentationConnectionProxy>) override;
   void didReceiveTextMessage(const WebString& message) override;
   void didReceiveBinaryMessage(const uint8_t* data, size_t length) override;
   void didChangeState(WebPresentationConnectionState) override;
+  void didClose() override;
 
   WebPresentationConnectionState getState();
   void didChangeState(WebPresentationConnectionState, bool shouldDispatchEvent);
 
  protected:
   // EventTarget implementation.
   void addedEventListener(const AtomicString& eventType,
                           RegisteredEventListener&) override;
 
  private:
@@ skipping 34 matching lines @@
   HeapDeque<Member<Message>> m_messages;
 
   BinaryType m_binaryType;
 
   std::unique_ptr<WebPresentationConnectionProxy> m_proxy;
 };
 
 }  // namespace blink
 
 #endif  // PresentationConnection_h