[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 be13d80c228bf4e8914b462042153500f6bab64a..da6e51d84fffac09afe5d1d641ad379e5a6d71da 100644
--- a/Source/modules/presentation/PresentationSession.h
+++ b/Source/modules/presentation/PresentationSession.h
@@ -49,6 +49,9 @@ public:
     void send(Blob*, ExceptionState&);
     void close();
 
+    String binaryType() const;
+    void setBinaryType(const String&);
+
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(statechange);
 
@@ -58,8 +61,9 @@ 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;
@@ -70,6 +74,11 @@ private:
         MessageTypeBlob,
     };
 
+    enum BinaryType {
+        BinaryTypeBlob,
+        BinaryTypeArrayBuffer
+    };
+
     struct Message {
         Message(const String& text)
             : type(MessageTypeText)
@@ -105,6 +114,8 @@ private:
     // For Blob data handling.
     Member<BlobLoader> m_blobLoader;
     Deque<OwnPtr<Message>> m_messages;
+
+    BinaryType m_binaryType;
 };
 
 } // namespace blink