Clear out cached codecs when calculating new codec lists.
Without this, every time WebRtcVideoEngine2 calls supported_codecs(),
the codec list grows.
BUG=webrtc:7020
Review-Url: https://codereview.webrtc.org/2639423006
Cr-Commit-Position: refs/heads/master@{#16178}
diff --git a/webrtc/media/BUILD.gn b/webrtc/media/BUILD.gn
index 23aa0f0..060b6af 100644
--- a/webrtc/media/BUILD.gn
+++ b/webrtc/media/BUILD.gn
@@ -338,6 +338,7 @@
"engine/videoencodersoftwarefallbackwrapper_unittest.cc",
"engine/webrtcmediaengine_unittest.cc",
"engine/webrtcvideocapturer_unittest.cc",
+ "engine/webrtcvideoencoderfactory_unittest.cc",
"engine/webrtcvideoengine2_unittest.cc",
"engine/webrtcvoiceengine_unittest.cc",
]
