Presentation API: implement renderer side of PresentationConnection.close().

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/events/EventTarget.h"
 #include "core/fileapi/Blob.h"
 #include "core/fileapi/FileError.h"
@@ skipping 34 matching lines @@
 
     DECLARE_VIRTUAL_TRACE();
 
     const String& id() const { return m_id; }
     const WTF::AtomicString& state() const;
 
     void send(const String& message, ExceptionState&);
     void send(PassRefPtr<DOMArrayBuffer>, ExceptionState&);
     void send(PassRefPtr<DOMArrayBufferView>, ExceptionState&);
     void send(Blob*, ExceptionState&);
+    void close();
     void terminate();
 
     String binaryType() const;
     void setBinaryType(const String&);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(statechange);
 
     // Returns true if and only if the WebPresentationConnectionClient represents this connection.
     bool matches(WebPresentationConnectionClient*) const;
@@ skipping 44 matching lines @@
 
     PresentationConnection(LocalFrame*, const String& id, const String& url);
 
     bool canSendMessage(ExceptionState&);
     void handleMessageQueue();
 
     // Callbacks invoked from BlobLoader.
     void didFinishLoadingBlob(PassRefPtr<DOMArrayBuffer>);
     void didFailLoadingBlob(FileError::ErrorCode);
 
-    // Returns true iff current state is closed or terminated.
-    bool isDisconnected() const;
+    // Cancel loads and pending messages when the connection is closed.
+    void tearDown();
 
     String m_id;
     String m_url;
     WebPresentationConnectionState m_state;
 
     // For Blob data handling.
     Member<BlobLoader> m_blobLoader;
     Deque<OwnPtr<Message>> m_messages;
 
     BinaryType m_binaryType;
 };
 
 } // namespace blink
 
 #endif // PresentationConnection_h