Adding CastRemotingSender for media remoting.

media/cast/net/cast_transport_config.h

Index: media/cast/net/cast_transport_config.h
diff --git a/media/cast/net/cast_transport_config.h b/media/cast/net/cast_transport_config.h
index 3ba95dce590c78cbbdbaf7c2deaecdd18182314d..abace7f8ca8e76a58714a18920b57519518ff00f 100644
--- a/media/cast/net/cast_transport_config.h
+++ b/media/cast/net/cast_transport_config.h
@@ -24,10 +24,12 @@ enum Codec {
   CODEC_AUDIO_OPUS,
   CODEC_AUDIO_PCM16,
   CODEC_AUDIO_AAC,
+  CODEC_AUDIO_REMOTE,
   CODEC_VIDEO_FAKE,
   CODEC_VIDEO_VP8,
   CODEC_VIDEO_H264,
-  CODEC_LAST = CODEC_VIDEO_H264
+  CODEC_VIDEO_REMOTE,
+  CODEC_LAST = CODEC_VIDEO_REMOTE
 };
 
 // Describes the content being transported over RTP streams.
@@ -63,6 +65,9 @@ struct CastTransportRtpConfig {
   CastTransportRtpConfig();
   ~CastTransportRtpConfig();
 
+  // Identifier for the RTP stream.
+  int32_t rtp_stream_id;

[Jeffrey Yasskin, 2016/09/15 20:48:12]

You forgot to initialize this field in the constructor, causing the MSan error
at
https://build.chromium.org/p/chromium.memory.full/builders/Linux%20MSan%20Tes...:

Uninitialized bytes in __msan_check_mem_is_initialized at offset 0 inside
[0x7fbbe5ccde80, 4)
==1==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0xaf3e2ba in WriteBytesCommon base/pickle.cc:478:3
    #1 0xaf3e2ba in WriteBytesStatic<4> base/pickle.cc:443:0
    #2 0xf7f518f in WritePOD<int> base/pickle.h:367:5
    #3 0xf7f518f in WriteInt base/pickle.h:229:0
    #4 0xf7f518f in Write ipc/ipc_message_utils.h:177:0
    #5 0xf7f518f in WriteParam<int> ipc/ipc_message_utils.h:104:0
    #6 0xf7f518f in Write chrome/common/cast_messages.h:85:0
    #7 0xf7dee43 in WriteParam<media::cast::CastTransportRtpConfig>
ipc/ipc_message_utils.h:104:3
    #8 0xf7dee43 in Write ipc/ipc_message_utils.h:711:0
    #9 0xf7dee43 in WriteParam<std::__1::tuple<const int &, const
media::cast::CastTransportRtpConfig &> > ipc/ipc_message_utils.h:104:0
    #10 0xf7dee43 in MessageT ipc/ipc_message_templates_impl.h:29:0
    #11 0xc4ac6e6 in MessageT<true, false> ipc/ipc_message_templates.h:99:33
    #12 0xc4ac6e6 in InitializeStream
chrome/renderer/media/cast_transport_ipc.cc:48:0
    #13 0xad6d53d in FrameSender media/cast/sender/frame_sender.cc:97:21
    #14 0xad487bf in AudioSender media/cast/sender/audio_sender.cc:23:7
    #15 0xad3a9e4 in InitializeAudio media/cast/cast_sender_impl.cc:120:11
    #16 0xc4a6031 in StartAudio
chrome/renderer/media/cast_session_delegate.cc:127:17
    #17 0xb0e7e7d in Run base/callback.h:64:12
    #18 0xb0e7e7d in RunTask base/debug/task_annotator.cc:54:0
    #19 0xaece7ab in RunTask base/message_loop/message_loop.cc:488:19
    #20 0xaed02ea in DeferOrRunPendingTask
base/message_loop/message_loop.cc:497:5
    #21 0xaed1e6b in DoWork base/message_loop/message_loop.cc:621:13
    #22 0xaee2613 in Run base/message_loop/message_pump_libevent.cc:217:31
    #23 0xaf69a1c in Run base/run_loop.cc:35:10
    #24 0xb0110ac in ThreadMain base/threading/thread.cc:307:3
    #25 0xaffc645 in ThreadFunc base/threading/platform_thread_posix.cc:71:13
    #26 0x7fbbf2b46e99 in start_thread
/build/eglibc-oqps9y/eglibc-2.15/nptl/pthread_create.c:308:0
    #27 0x7fbbebf9636c in ??
/build/eglibc-oqps9y/eglibc-2.15/misc/../sysdeps/unix/sysv/linux/x86_64/clone.S:112:0

  Uninitialized value was stored to memory at
    #0 0xf7f54c1 in Write ipc/ipc_message_utils.h:177:64
    #1 0xf7f54c1 in WriteParam<int> ipc/ipc_message_utils.h:104:0
    #2 0xf7f54c1 in Write chrome/common/cast_messages.h:85:0
    #3 0xf7dee43 in WriteParam<media::cast::CastTransportRtpConfig>
ipc/ipc_message_utils.h:104:3
    #4 0xf7dee43 in Write ipc/ipc_message_utils.h:711:0
    #5 0xf7dee43 in WriteParam<std::__1::tuple<const int &, const
media::cast::CastTransportRtpConfig &> > ipc/ipc_message_utils.h:104:0
    #6 0xf7dee43 in MessageT ipc/ipc_message_templates_impl.h:29:0
    #7 0xc4ac6e6 in MessageT<true, false> ipc/ipc_message_templates.h:99:33
    #8 0xc4ac6e6 in InitializeStream
chrome/renderer/media/cast_transport_ipc.cc:48:0
    #9 0xad6d53d in FrameSender media/cast/sender/frame_sender.cc:97:21
    #10 0xad487bf in AudioSender media/cast/sender/audio_sender.cc:23:7
    #11 0xad3a9e4 in InitializeAudio media/cast/cast_sender_impl.cc:120:11
    #12 0xc4a6031 in StartAudio
chrome/renderer/media/cast_session_delegate.cc:127:17
    #13 0xb0e7e7d in Run base/callback.h:64:12
    #14 0xb0e7e7d in RunTask base/debug/task_annotator.cc:54:0
    #15 0xaece7ab in RunTask base/message_loop/message_loop.cc:488:19
    #16 0xaed02ea in DeferOrRunPendingTask
base/message_loop/message_loop.cc:497:5
    #17 0xaed1e6b in DoWork base/message_loop/message_loop.cc:621:13
    #18 0xaee2613 in Run base/message_loop/message_pump_libevent.cc:217:31
    #19 0xaf69a1c in Run base/run_loop.cc:35:10
    #20 0xb0110ac in ThreadMain base/threading/thread.cc:307:3
    #21 0xaffc645 in ThreadFunc base/threading/platform_thread_posix.cc:71:13
    #22 0x7fbbf2b46e99 in start_thread
/build/eglibc-oqps9y/eglibc-2.15/nptl/pthread_create.c:308:0

  Uninitialized value was created by an allocation of 'transport_config' in the
stack frame of function
'_ZN5media4cast11FrameSenderC2E13scoped_refptrINS0_15CastEnvironmentEEPNS0_13CastTransportERKNS0_17FrameSenderConfigEPNS0_17CongestionControlE'
    #0 0xad6c6e0 in FrameSender media/cast/sender/frame_sender.cc:78:0

SUMMARY: MemorySanitizer: use-of-uninitialized-value
(/b/swarm_slave/w/iriJwbdy/out/Release/browser_tests+0xaf3e2ba)

+
   // Identifier refering to this sender.
   uint32_t ssrc;