Refactoring: Use enum for RtpPayloadType.

chrome/renderer/media/cast_rtp_stream.h

 // Copyright 2013 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 CHROME_RENDERER_MEDIA_CAST_RTP_STREAM_H_
 #define CHROME_RENDERER_MEDIA_CAST_RTP_STREAM_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 20 matching lines @@
   std::string key;
   std::string value;
 
   CastCodecSpecificParams();
   ~CastCodecSpecificParams();
 };
 
 // Defines the basic properties of a payload supported by cast transport.
 struct CastRtpPayloadParams {
   // RTP specific field that identifies the content type.
-  int payload_type = media::cast::kDefaultRtpVideoPayloadType;
+  media::cast::RtpPayloadType payload_type =
+      media::cast::RtpPayloadType::VIDEO_VP8;
 
   // Maximum latency in milliseconds. Implemetation tries to keep latency
   // under this threshold.
   int max_latency_ms = media::cast::kDefaultRtpMaxDelayMs;
 
   // Minimum latency.
   // Default value (0) means use max_latency_ms.
   int min_latency_ms = 0;
 
   // Starting latency on animated content.
@@ skipping 113 matching lines @@
   CastRtpParams params_;
   base::Closure stop_callback_;
   ErrorCallback error_callback_;
 
   base::WeakPtrFactory<CastRtpStream> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastRtpStream);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_RTP_STREAM_H_