Revert of Disable flaky test VideoProcessorIntegrationTest.ProcessNoLossChangeFrameRateFrameDropVP9

webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc

Index: webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc
diff --git a/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc b/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc
index 5a202a1e3c563a5a299a2c3602a65407912f4c04..d7b643bf1c90213790475343a98b01d67a7c8403 100644
--- a/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc
+++ b/webrtc/modules/video_coding/codecs/test/videoprocessor_integrationtest.cc
@@ -702,11 +702,8 @@ TEST_F(VideoProcessorIntegrationTest, ProcessNoLossChangeBitRateVP9) {
 // for the rate control metrics can be lower. One key frame (first frame only).
 // Note: quality after update should be higher but we currently compute quality
 // metrics averaged over whole sequence run.
-
-
-// Flaky https://bugs.chromium.org/p/webrtc/issues/detail?id=6057.
 TEST_F(VideoProcessorIntegrationTest,
-       DISABLED_ProcessNoLossChangeFrameRateFrameDropVP9) {
+       ProcessNoLossChangeFrameRateFrameDropVP9) {
   config_.networking_config.packet_loss_probability = 0;
   // Bitrate and frame rate profile.
   RateProfile rate_profile;