[Cast] Compute utilization metrics and add performance overlay.

media/cast/net/cast_transport_config.h

 // Copyright 2014 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 MEDIA_CAST_NET_CAST_TRANSPORT_CONFIG_H_
 #define MEDIA_CAST_NET_CAST_TRANSPORT_CONFIG_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 53 matching lines @@
     INDEPENDENT,
 
     // Independently decodable, and no future frames will depend on any frames
     // before this one.
     KEY,
 
     DEPENDENCY_LAST = KEY
   };
 
   EncodedFrame();
-  ~EncodedFrame();
+  virtual ~EncodedFrame();
 
   // Convenience accessors to data as an array of uint8 elements.
   const uint8* bytes() const {
     return reinterpret_cast<uint8*>(string_as_array(
         const_cast<std::string*>(&data)));
   }
   uint8* mutable_bytes() {
     return reinterpret_cast<uint8*>(string_as_array(&data));
   }
 
@@ skipping 97 matching lines @@
          lhs.ntp_fraction == rhs.ntp_fraction &&
          lhs.rtp_timestamp == rhs.rtp_timestamp &&
          lhs.send_packet_count == rhs.send_packet_count &&
          lhs.send_octet_count == rhs.send_octet_count;
 }
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_NET_CAST_TRANSPORT_CONFIG_H_