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

public/platform/modules/presentation/WebPresentationController.h

Index: public/platform/modules/presentation/WebPresentationController.h
diff --git a/public/platform/modules/presentation/WebPresentationController.h b/public/platform/modules/presentation/WebPresentationController.h
index a539e577ae9126a9446c70122995789c9c7a03de..a02d8b53b98e7f7145d4ab53f6242ff14c91e827 100644
--- a/public/platform/modules/presentation/WebPresentationController.h
+++ b/public/platform/modules/presentation/WebPresentationController.h
@@ -34,6 +34,9 @@ public:
 
     // Called when a text message of a session is received.
     virtual void didReceiveSessionTextMessage(WebPresentationSessionClient*, const WebString& message) = 0;
+
+    // Called when a binary message of a session is received.
+    virtual void didReceiveSessionBinaryMessage(WebPresentationSessionClient*, const uint8_t* data, size_t length) = 0;
 };
 
 } // namespace blink