Add support of sending blob data for RTCDataChannel

Source/modules/mediastream/RTCDataChannel.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef RTCDataChannel_h
 #define RTCDataChannel_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/events/EventTarget.h"
+#include "core/fileapi/FileError.h"
+#include "core/fileapi/FileReaderLoaderClient.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebRTCDataChannelHandler.h"
 #include "public/platform/WebRTCDataChannelHandlerClient.h"
+#include "wtf/Deque.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 class WebRTCDataChannelHandler;
 class WebRTCPeerConnectionHandler;
 struct WebRTCDataChannelInit;
 }
 
 namespace WebCore {
 
 class Blob;
+class BlobDataHandle;
 class ExceptionState;
+class FileReaderLoader;
 
-class RTCDataChannel FINAL : public RefCounted<RTCDataChannel>, public ScriptWrappable, public EventTargetWithInlineData, public blink::WebRTCDataChannelHandlerClient {
+class RTCDataChannel FINAL : public RefCounted<RTCDataChannel>, public ScriptWrappable, public EventTargetWithInlineData, public blink::WebRTCDataChannelHandlerClient, public FileReaderLoaderClient {
     REFCOUNTED_EVENT_TARGET(RTCDataChannel);
 public:
     static PassRefPtr<RTCDataChannel> create(ExecutionContext*, PassOwnPtr<blink::WebRTCDataChannelHandler>);
     static PassRefPtr<RTCDataChannel> create(ExecutionContext*, blink::WebRTCPeerConnectionHandler*, const String& label, const blink::WebRTCDataChannelInit&, ExceptionState&);
     virtual ~RTCDataChannel();
 
     String label() const;
 
     // DEPRECATED
     bool reliable() const;
@@ skipping 21 matching lines @@
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(close);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
 
     void stop();
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
     virtual ExecutionContext* executionContext() const OVERRIDE;
 
+    // FileReaderLoaderClient functions.
+    virtual void didStartLoading() OVERRIDE;
+    virtual void didReceiveData() OVERRIDE;
+    virtual void didFinishLoading() OVERRIDE;
+    virtual void didFail(FileError::ErrorCode) OVERRIDE;
+
 private:
     RTCDataChannel(ExecutionContext*, PassOwnPtr<blink::WebRTCDataChannelHandler>);
 
     void scheduleDispatchEvent(PassRefPtrWillBeRawPtr<Event>);
     void scheduledEventTimerFired(Timer<RTCDataChannel>*);
 
+    void processOutgoingBlobQueue();
+
     ExecutionContext* m_executionContext;
 
     // blink::WebRTCDataChannelHandlerClient
     virtual void didChangeReadyState(blink::WebRTCDataChannelHandlerClient::ReadyState) OVERRIDE;
     virtual void didReceiveStringData(const blink::WebString&) OVERRIDE;
     virtual void didReceiveRawData(const char*, size_t) OVERRIDE;
     virtual void didDetectError() OVERRIDE;
 
     OwnPtr<blink::WebRTCDataChannelHandler> m_handler;
 
     bool m_stopped;
 
     blink::WebRTCDataChannelHandlerClient::ReadyState m_readyState;
 
     enum BinaryType {
         BinaryTypeBlob,
         BinaryTypeArrayBuffer
     };
     BinaryType m_binaryType;
 
+    enum BlobLoaderStatus {
+        BlobLoaderNotStarted,
+        BlobLoaderStarted,
+        BlobLoaderFinished,
+        BlobLoaderFailed
+    };
+    OwnPtr<FileReaderLoader> m_blobLoader;
+    Deque<RefPtr<BlobDataHandle> > m_outgoingBlobQueue;
+    BlobLoaderStatus m_blobLoaderStatus;
+
     Timer<RTCDataChannel> m_scheduledEventTimer;
     WillBePersistentHeapVector<RefPtrWillBeMember<Event> > m_scheduledEvents;
 };
 
 } // namespace WebCore
 
 #endif // RTCDataChannel_h