Add proper lifetime of encoder-specific settings.

webrtc/video/video_quality_test.h

Index: webrtc/video/video_quality_test.h
diff --git a/webrtc/video/video_quality_test.h b/webrtc/video/video_quality_test.h
index e138a89a8c237acf4f32a1d058ab74f24234397d..170480452d1c5532a45cc6f07130ffb761af3f71 100644
--- a/webrtc/video/video_quality_test.h
+++ b/webrtc/video/video_quality_test.h
@@ -109,7 +109,6 @@ class VideoQualityTest : public test::CallTest {
   std::unique_ptr<test::TraceToStderr> trace_to_stderr_;
   std::unique_ptr<test::FrameGenerator> frame_generator_;
   std::unique_ptr<VideoEncoder> encoder_;
-  VideoCodecUnion codec_settings_;
   Clock* const clock_;
 
   Params params_;