[Presentation API] (4th)(1-UA blink side) Add WebPresentationConnection and WebPresentationConnecti…

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

 // Copyright 2015 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/PresentationController.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/presentation/PresentationConnection.h"
 #include "public/platform/modules/presentation/WebPresentationClient.h"
@@ skipping 46 matching lines @@
   return m_client;
 }
 
 DEFINE_TRACE(PresentationController) {
   visitor->trace(m_presentation);
   visitor->trace(m_connections);
   Supplement<LocalFrame>::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
-void PresentationController::didStartDefaultSession(
+WebPresentationConnection* PresentationController::didStartDefaultSession(
     const WebPresentationSessionInfo& sessionInfo) {
   if (!m_presentation || !m_presentation->defaultRequest())
-    return;
-  PresentationConnection::take(this, sessionInfo,
-                               m_presentation->defaultRequest());
+    return nullptr;
+
+  return PresentationConnection::take(this, sessionInfo,
+                                      m_presentation->defaultRequest());
 }
 
 void PresentationController::didChangeSessionState(
     const WebPresentationSessionInfo& sessionInfo,
     WebPresentationConnectionState state) {
   PresentationConnection* connection = findConnection(sessionInfo);
   if (!connection)
     return;
   connection->didChangeState(state);
 }
@@ skipping 74 matching lines @@
     const WebPresentationSessionInfo& sessionInfo) {
   for (const auto& connection : m_connections) {
     if (connection->matches(sessionInfo))
       return connection.get();
   }
 
   return nullptr;
 }
 
 }  // namespace blink