[Presentation API] Resolve PresentationRequest::reconnect() with existing presentation connection i…

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

 // 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.
 
 #ifndef PresentationController_h
 #define PresentationController_h
 
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/ModulesExport.h"
@@ skipping 55 matching lines @@
   void setPresentation(Presentation*);
 
   // Called by the Presentation object when the default request is updated
   // in order to notify the client about the change of default presentation
   // url.
   void setDefaultRequestUrl(const KURL&);
 
   // Handling of running connections.
   void registerConnection(PresentationConnection*);
 
+  // Return a connection in |m_connections| with id equals to |presentationId|,
+  // url equals to one of |presentationUrls|, and state is not terminated.
+  // Return null if such a connection does not exist.
+  PresentationConnection* findExistingConnection(
+      const blink::WebVector<blink::WebURL>& presentationUrls,
+      const blink::WebString& presentationId);
+
  private:
   PresentationController(LocalFrame&, WebPresentationClient*);
 
   // Implementation of ContextLifecycleObserver.
   void contextDestroyed() override;
 
   // Return the connection associated with the given |connectionClient| or
   // null if it doesn't exist.
   PresentationConnection* findConnection(WebPresentationConnectionClient*);
 
@@ skipping 10 matching lines @@
   // The presentation connections associated with that frame.
   // TODO(mlamouri): the PresentationController will keep any created
   // connections alive until the frame is detached. These should be weak ptr
   // so that the connection can be GC'd.
   HeapHashSet<Member<PresentationConnection>> m_connections;
 };
 
 }  // namespace blink
 
 #endif  // PresentationController_h