Allow mocking SendSideCongestionController for Call tests.

webrtc/modules/congestion_controller/BUILD.gn

Index: webrtc/modules/congestion_controller/BUILD.gn
diff --git a/webrtc/modules/congestion_controller/BUILD.gn b/webrtc/modules/congestion_controller/BUILD.gn
index 647079a38257934bc633187f5a65051214764586..f54abafc61d8cea691ac257dbd380d23d112504b 100644
--- a/webrtc/modules/congestion_controller/BUILD.gn
+++ b/webrtc/modules/congestion_controller/BUILD.gn
@@ -100,4 +100,15 @@ if (rtc_include_tests) {
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
+
+  rtc_source_set("mock_send_side_congestion_controller") {

[nisse-webrtc, 2017/04/26 07:37:14]

Are there any naming conventions for this type of targets? 

Might be good to generalize it a little, and include mock_congestion_observer.h
too (currently not included in any gn target, it seems). It's used by
webrtc/audio/audio_send_stream_unittest.cc and probably by some downstream tests
too.

[Zach Stein, 2017/04/26 20:39:52]

Not sure about naming conventions. I was copying what the
mock_remote_bitrate_observer target does, but it looks unusual to me too.

+    testonly = true
+    sources = [
+      "include/mock/mock_send_side_congestion_controller.h",
+    ]
+    deps = [
+      ":congestion_controller",
+      "../../test:test_support",
+    ]
+  }
 }