Ignore WebRTC-LibvpxVp9Encoder-SvcFrameDropConfig in VP9 fuzzer

Bug: chromium:326188141, webrtc:15827
Change-Id: I0dca4df354db0f9e2f758e9ecf32c8b50f735aff
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/340220
Auto-Submit: Sergey Silkin <ssilkin@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41780}

test/fuzzers/vp9_encoder_references_fuzzer.cc

diff --git a/test/fuzzers/vp9_encoder_references_fuzzer.cc b/test/fuzzers/vp9_encoder_references_fuzzer.cc
index 2d34789..713fab1 100644
--- a/test/fuzzers/vp9_encoder_references_fuzzer.cc
+++ b/test/fuzzers/vp9_encoder_references_fuzzer.cc
@@ -193,6 +193,12 @@
         key == "WebRTC-VP9QualityScaler") {
       return "";
     }
+
+    // TODO: bugs.webrtc.org/15827 - Fuzz frame drop config.
+    if (key == "WebRTC-LibvpxVp9Encoder-SvcFrameDropConfig") {
+      return "";
+    }
+
     // Crash when using unexpected field trial to decide if it should be fuzzed
     // or have a constant value.
     RTC_CHECK(false) << "Unfuzzed field trial " << key << "\n";