Revert of Stop using hardcoded payload types for video codecs

webrtc/media/base/mediaconstants.cc

Index: webrtc/media/base/mediaconstants.cc
diff --git a/webrtc/media/base/mediaconstants.cc b/webrtc/media/base/mediaconstants.cc
index bce252195a24e69bbab1d3d56b0ff5dfe2cd665e..5acd8cdb019b05d315618ede8908d67f7cf6ad82 100644
--- a/webrtc/media/base/mediaconstants.cc
+++ b/webrtc/media/base/mediaconstants.cc
@@ -108,5 +108,17 @@
 const char kH264FmtpPacketizationMode[] = "packetization-mode";
 const char kH264ProfileLevelConstrainedBaseline[] = "42e01f";
 
+const int kDefaultVp8PlType = 100;
+const int kDefaultVp9PlType = 101;
+const int kDefaultH264PlType = 107;
+const int kDefaultRedPlType = 116;
+const int kDefaultUlpfecType = 117;
+const int kDefaultFlexfecPlType = 118;
+const int kDefaultRtxVp8PlType = 96;
+const int kDefaultRtxVp9PlType = 97;
+const int kDefaultRtxRedPlType = 98;
+const int kDefaultRtxH264ConstrainedBaselinePlType = 99;
+const int kDefaultRtxH264ConstrainedHighPlType = 102;
+
 const int kDefaultVideoMaxFramerate = 60;
 }  // namespace cricket