Use VPX_ERROR_RESILIENT_DEFAULT constant.

webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc

Index: webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
index 2fbceb1d7904b8a5ff7714a30fcce6afe1bf9266..1578badaed2353d7b7c538a241bfafc212208f0e 100644
--- a/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/vp8_impl.cc
@@ -397,9 +397,7 @@ int VP8EncoderImpl::InitEncode(const VideoCodec* inst,
       configurations_[0].g_error_resilient = 0;
       break;
     case kResilientStream:
-      configurations_[0].g_error_resilient = 1;  // TODO(holmer): Replace with
-      // VPX_ERROR_RESILIENT_DEFAULT when we
-      // drop support for libvpx 9.6.0.
+      configurations_[0].g_error_resilient = VPX_ERROR_RESILIENT_DEFAULT;
       break;
     case kResilientFrames:
       return WEBRTC_VIDEO_CODEC_ERR_PARAMETER;  // Not supported