[Presentation API] 1-UA: send message between controller and receiver page

third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h

Index: third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h
diff --git a/third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h b/third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h
index d2b4d60abade05692b86b949414c8a2384129364..4cb105f2696aeedaf17baff08001a0d31c544251 100644
--- a/third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h
+++ b/third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h
@@ -86,6 +86,15 @@ public:
     virtual void setDefaultPresentationUrls(const WebVector<WebURL>&) = 0;
 };
 
+class WebPresentationMessageObserver {
+public:
+    // Called when a text message of a session is received.
+    virtual void didReceiveSessionTextMessage(WebPresentationConnectionClient*, const WebString& message) = 0;
+
+    // Called when a binary message of a session is received.
+    virtual void didReceiveSessionBinaryMessage(WebPresentationConnectionClient*, const uint8_t* data, size_t length) = 0;
+};
+
 } // namespace blink
 
 #endif // WebPresentationClient_h