[chrome.displaySource] Add a base class for audio and video encoders.

extensions/renderer/api/display_source/wifi_display/wifi_display_media_pipeline.h

 // 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.
 
 #ifndef EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_MEDIA_PIPELINE_H_
 #define EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_MEDIA_PIPELINE_H_
 
 #include <memory>
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/lock.h"
 #include "extensions/common/mojo/wifi_display_session_service.mojom.h"
 #include "extensions/renderer/api/display_source/wifi_display/wifi_display_media_packetizer.h"
 #include "extensions/renderer/api/display_source/wifi_display/wifi_display_video_encoder.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
@@ skipping 45 matching lines @@
       const std::pair<int, int>& sink_rtp_ports,
       const RegisterMediaServiceCallback& service_callback,
       const ErrorCallback& error_callback);
 
   void CreateVideoEncoder();
   void CreateMediaPacketizer();
   void OnVideoEncoderCreated(
       scoped_refptr<WiFiDisplayVideoEncoder> video_encoder);
   void OnMediaServiceRegistered();
 
-  void OnEncodedVideoFrame(const WiFiDisplayEncodedFrame& frame);
+  void OnEncodedVideoFrame(std::unique_ptr<WiFiDisplayEncodedFrame> frame);
 
   bool OnPacketizedMediaDatagramPacket(
      WiFiDisplayMediaDatagramPacket media_datagram_packet);
 
   scoped_refptr<WiFiDisplayVideoEncoder> video_encoder_;
   std::unique_ptr<WiFiDisplayMediaPacketizer> packetizer_;
 
   wds::SessionType type_;
   WiFiDisplayVideoEncoder::InitParameters video_parameters_;
   wds::AudioCodec audio_codec_;
   std::string sink_ip_address_;
   std::pair<int, int> sink_rtp_ports_;
 
   RegisterMediaServiceCallback service_callback_;
   ErrorCallback error_callback_;
   InitCompletionCallback init_completion_callback_;
   WiFiDisplayMediaServicePtr media_service_;
 
   base::WeakPtrFactory<WiFiDisplayMediaPipeline> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WiFiDisplayMediaPipeline);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_API_DISPLAY_SOURCE_WIFI_DISPLAY_WIFI_DISPLAY_MEDIA_PIPELINE_H_