[Presentation API] 1-UA: notify receiver page when receiver connection becomes available (blink sid…

third_party/WebKit/Source/modules/presentation/Presentation.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/presentation/Presentation.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/presentation/PresentationController.h"
 #include "modules/presentation/PresentationReceiver.h"
@@ skipping 38 matching lines @@
         return;
 
     PresentationController* controller = PresentationController::from(*frame());
     if (!controller)
         return;
     controller->setDefaultRequestUrl(request ? request->url() : KURL());
 }
 
 PresentationReceiver* Presentation::receiver()
 {
-    // TODO(mlamouri): only return something if the Blink instance is running in
+    PresentationController* controller = PresentationController::from(*frame());
+    auto client = controller ? controller->client() : nullptr;

[dcheng, 2016/09/28 23:55:13]

Nit: auto*

[zhaobin, 2016/09/29 18:38:53]

Done.

+    // TODO(crbug.com/647296): only return something if the Blink instance is running in
     // presentation receiver mode. The flag PresentationReceiver could be used
     // for that.
     if (!m_receiver)
-        m_receiver = new PresentationReceiver(frame());
+        m_receiver = new PresentationReceiver(frame(), client);
     return m_receiver;
 }
 
 } // namespace blink