[PresentationAPI] on-session-message handler for binary messages (Blink side).

Source/modules/presentation/PresentationSession.h

Index: Source/modules/presentation/PresentationSession.h
diff --git a/Source/modules/presentation/PresentationSession.h b/Source/modules/presentation/PresentationSession.h
index 410fa047d9016fb8ce3394c5eaca0d3f918fc874..c54c3cc9d4055264689fab82086144934bd869c9 100644
--- a/Source/modules/presentation/PresentationSession.h
+++ b/Source/modules/presentation/PresentationSession.h
@@ -50,6 +50,9 @@ public:
     void send(Blob*, ExceptionState&);
     void close();
 
+    String binaryType() const;
+    void setBinaryType(const String&);
+
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(statechange);
 
@@ -59,8 +62,9 @@ public:
     // Notifies the session about its state change.
     void didChangeState(WebPresentationSessionState);
 
-    // Notifies the session about new text message.
+    // Notifies the session about new message.
     void didReceiveTextMessage(const String& message);
+    void didReceiveBinaryMessage(const uint8_t* data, size_t length);
 
 private:
     class BlobLoader;
@@ -71,6 +75,11 @@ private:
         MessageTypeBlob,
     };
 
+    enum BinaryType {
+        BinaryTypeBlob,
+        BinaryTypeArrayBuffer
+    };
+
     struct Message {
         Message(const String& text)
             : type(MessageTypeText)
@@ -111,6 +120,8 @@ private:
     // For Blob data handling.
     Member<BlobLoader> m_blobLoader;
     Deque<OwnPtr<Message>> m_messages;
+
+    BinaryType m_binaryType;
 };
 
 } // namespace blink