[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 8aaf55c7bff88ded31526a3552f77db9f3847503..1d3074535743c2b52e99d40ec57092cd5c720aae 100644
--- a/Source/modules/presentation/Presentation.h
+++ b/Source/modules/presentation/Presentation.h
@@ -69,6 +69,7 @@ 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*);