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

Source/modules/presentation/Presentation.h

Index: Source/modules/presentation/Presentation.h
diff --git a/Source/modules/presentation/Presentation.h b/Source/modules/presentation/Presentation.h
index 2ad18a27d95047389cf927e44ea80ce4fa19954e..7bbf79ff91cdc9b74906b51c577b2759f8b570f8 100644
--- a/Source/modules/presentation/Presentation.h
+++ b/Source/modules/presentation/Presentation.h
@@ -58,6 +58,7 @@ public:
 
     // Called when the |onmessage| event needs to be fired to the right session.
     void didReceiveSessionTextMessage(WebPresentationSessionClient*, const String& message);
+    void didReceiveSessionBinaryMessage(WebPresentationSessionClient*, const uint8_t* data, size_t length);
 
     // Adds a session to the open sessions list.
     void registerSession(PresentationSession*);