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

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

 // Copyright 2016 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/PresentationConnectionList.h"
 
 #include "core/frame/UseCounter.h"
 #include "modules/EventTargetModules.h"
 #include "modules/presentation/PresentationConnection.h"
 #include "modules/presentation/PresentationConnectionAvailableEvent.h"
@@ skipping 36 matching lines @@
 {
     dispatchEvent(PresentationConnectionAvailableEvent::create(
         EventTypeNames::connectionavailable, connection));
 }
 
 bool PresentationConnectionList::isEmpty()
 {
     return m_connections.isEmpty();
 }
 
+PresentationConnection* PresentationConnectionList::findConnection(WebPresentationConnectionClient* connectionClient)
+{
+    for (const auto& connection : m_connections) {
+        if (connection->matches(connectionClient))
+            return connection.get();
+    }
+
+    return nullptr;
+}
+
 DEFINE_TRACE(PresentationConnectionList)
 {
     visitor->trace(m_connections);
     ContextLifecycleObserver::trace(visitor);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink