Create empty PayloadTypeMapper files and add them to builds.
This is related to https://codereview.webrtc.org/2072753002/ and its
eventual revert. That change required changes in chromium's build
files to not break it. Those build changes cannot be made before
these new files are available.
TBR=tommi@webrtc.org
Review-Url: https://codereview.webrtc.org/2145973003
Cr-Commit-Position: refs/heads/master@{#13466}
diff --git a/webrtc/media/BUILD.gn b/webrtc/media/BUILD.gn
index 34e8155..9689cd2 100644
--- a/webrtc/media/BUILD.gn
+++ b/webrtc/media/BUILD.gn
@@ -92,6 +92,8 @@
"base/videosourcebase.h",
"devices/videorendererfactory.h",
"engine/nullwebrtcvideoengine.h",
+ "engine/payload_type_mapper.cc",
+ "engine/payload_type_mapper.h",
"engine/simulcast.cc",
"engine/simulcast.h",
"engine/webrtccommon.h",