[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 a7c8695fee96891aae8cbb1b9dfd8536daf24b3b..3ccb9415c49e474d62c11c4227c2aec148ca521e 100644
--- a/public/platform/modules/presentation/WebPresentationController.h
+++ b/public/platform/modules/presentation/WebPresentationController.h
@@ -27,6 +27,9 @@ 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