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

Source/modules/presentation/PresentationSession.idl

Index: Source/modules/presentation/PresentationSession.idl
diff --git a/Source/modules/presentation/PresentationSession.idl b/Source/modules/presentation/PresentationSession.idl
index 6c330498a53b63d03f1084811d8c968fc46a11f1..9c0471e510a84dd54302a962b5e848920e8f86b1 100644
--- a/Source/modules/presentation/PresentationSession.idl
+++ b/Source/modules/presentation/PresentationSession.idl
@@ -22,6 +22,7 @@ enum PresentationSessionState {
     [RaisesException] void send(Blob data);
     void close();
 
+    attribute BinaryType binaryType;

[USE s.singapati at gmail.com, 2015/06/30 14:32:29]

"enum BinaryType" is already defined in WebSocket.idl, so defining again here
causes the build failure (Exception: Enumeration BinaryType has multiple
definitions). Otherwise, defining binaryType for eg., as DOMString is needed to
avoid dependency from WebSocket.idl.

     attribute EventHandler onmessage;
     attribute EventHandler onstatechange;
 };