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

content/browser/presentation/presentation_service_impl.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 CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_
 #define CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_
 
 #include <deque>
 #include <map>
 #include <memory>
@@ skipping 211 matching lines @@
   void OnJoinSessionError(
       int request_session_id,
       const PresentationError& error);
   void OnSendMessageCallback(bool sent);
 
   // Calls to |delegate_| to start listening for state changes for |connection|.
   // State changes will be returned via |OnConnectionStateChanged|.
   void ListenForConnectionStateChange(
       const PresentationSessionInfo& connection);
 
+  // OffscreenPresentationClient Implementation
   // Passed to embedder's implementation of PresentationServiceDelegate for
   // later invocation when session messages arrive.
   void OnSessionMessages(
       const content::PresentationSessionInfo& session,
       const ScopedVector<PresentationSessionMessage>& messages,
-      bool pass_ownership);
+      bool pass_ownership) override;
+
+  void SetOffscreenPresentationClient(OffscreenPresentationClient*) override;
+
+  void RemoveOffscreenPresentationClient(OffscreenPresentationClient*) override;
 
   void OnReceiverConnectionAvailable(const content::PresentationSessionInfo&,
                                      OffscreenPresentationClient* controller);
 
-  // OffscreenPresentationClient Implementation
-  void SetOffscreenPresentationClient(OffscreenPresentationClient*) override;
-
-  void RemoveOffscreenPresentationClient(OffscreenPresentationClient*) override;
-
   // Associates a JoinSession |callback| with a unique request ID and
   // stores it in a map.
   // Returns a positive value on success.
   int RegisterJoinSessionCallback(const NewSessionCallback& callback);
 
   // Invoked by the embedder's PresentationServiceDelegate when a
   // PresentationConnection's state has changed.
   void OnConnectionStateChanged(
       const PresentationSessionInfo& connection,
       const PresentationConnectionStateChangeInfo& info);
@@ skipping 45 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<PresentationServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PresentationServiceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PRESENTATION_PRESENTATION_SERVICE_IMPL_H_