[chrome.displaySource][WiFi Display] Video formats capability negotiation

extensions/renderer/api/display_source/wifi_display/wifi_display_session.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 EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_SESSION_H_
 #define EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_SESSION_H_
 
 #include <map>
 #include <string>
 
@@ skipping 45 matching lines @@
   std::string GetLocalIPAddress() const override;
   int GetNextCSeq(int* initial_peer_cseq = nullptr) const override;
 
   // wds::Peer::Observer overrides.
   void ErrorOccurred(wds::ErrorType error) override;
   void SessionCompleted() override;
 
   // A connection error handler for the mojo objects used in this class.
   void OnIPCConnectionError();
 
+  // An error handler for media pipeline error.
+  void OnMediaError(const std::string& error);
+
+  void Terminate();
+
   void RunStartCallback(bool success, const std::string& error = "");
   void RunTerminateCallback(bool success, const std::string& error = "");
 
  private:
   scoped_ptr<wds::Source> wfd_source_;
   scoped_ptr<WiFiDisplayMediaManager> media_manager_;
   WiFiDisplaySessionServicePtr service_;
   mojo::Binding<WiFiDisplaySessionServiceClient> binding_;
   std::string ip_address_;
   std::map<int, scoped_ptr<base::Timer>> timers_;
 
   DisplaySourceSessionParams params_;
   CompletionCallback start_completion_callback_;
   CompletionCallback teminate_completion_callback_;
   // Holds sequence number for the following RTSP request-response pair.
   mutable int cseq_;
   int timer_id_;
   base::WeakPtrFactory<WiFiDisplaySession> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WiFiDisplaySession);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_SESSION_H_