Add SSRC to RtpEncodingParameters for audio.

webrtc/media/engine/webrtcvoiceengine_unittest.cc

Index: webrtc/media/engine/webrtcvoiceengine_unittest.cc
diff --git a/webrtc/media/engine/webrtcvoiceengine_unittest.cc b/webrtc/media/engine/webrtcvoiceengine_unittest.cc
index d90695de26a310fb94cf9ef8a189c08cfd60f6aa..bddefdd145fe33e1a4b386a859aa1af456318cea 100644
--- a/webrtc/media/engine/webrtcvoiceengine_unittest.cc
+++ b/webrtc/media/engine/webrtcvoiceengine_unittest.cc
@@ -1113,6 +1113,14 @@ TEST_F(WebRtcVoiceEngineTestFake, GetRtpSendParametersCodecs) {
   EXPECT_EQ(kPcmuCodec.ToCodecParameters(), rtp_parameters.codecs[1]);
 }
 
+// Test that GetRtpSendParameters returns an SSRC.
+TEST_F(WebRtcVoiceEngineTestFake, GetRtpSendParametersSsrc) {
+  EXPECT_TRUE(SetupSendStream());
+  webrtc::RtpParameters rtp_parameters = channel_->GetRtpSendParameters(kSsrc1);
+  ASSERT_EQ(1u, rtp_parameters.encodings.size());
+  EXPECT_EQ(kSsrc1, rtp_parameters.encodings[0].ssrc);
+}
+
 // Test that if we set/get parameters multiple times, we get the same results.
 TEST_F(WebRtcVoiceEngineTestFake, SetAndGetRtpSendParameters) {
   EXPECT_TRUE(SetupSendStream());
@@ -1146,6 +1154,15 @@ TEST_F(WebRtcVoiceEngineTestFake, GetRtpReceiveParametersCodecs) {
   EXPECT_EQ(kPcmuCodec.ToCodecParameters(), rtp_parameters.codecs[1]);
 }
 
+// Test that GetRtpReceiveParameters returns an SSRC.
+TEST_F(WebRtcVoiceEngineTestFake, GetRtpReceiveParametersSsrc) {
+  EXPECT_TRUE(SetupRecvStream());
+  webrtc::RtpParameters rtp_parameters =

[the sun, 2016/12/12 08:59:19]

note: you could use 'auto' here and avoid a line break

[Taylor Brandstetter, 2016/12/12 18:50:17]

I think I'll leave it in this case, for consistency with the other tests and
because there are so many "parameters" structures that the clarity sometimes
helps.

+      channel_->GetRtpReceiveParameters(kSsrc1);
+  ASSERT_EQ(1u, rtp_parameters.encodings.size());
+  EXPECT_EQ(kSsrc1, rtp_parameters.encodings[0].ssrc);
+}
+
 // Test that if we set/get parameters multiple times, we get the same results.
 TEST_F(WebRtcVoiceEngineTestFake, SetAndGetRtpReceiveParameters) {
   EXPECT_TRUE(SetupRecvStream());