Limit fuzzer input size for comfort noise decoder fuzzer

This avoids fuzzer timeouts on the bot.

NOTRY=True

Bug: chromium:857404
Change-Id: I480c53f005536029c667b9f41aab3ecaca14d125
Reviewed-on: https://webrtc-review.googlesource.com/86945
Commit-Queue: Henrik Lundin <henrik.lundin@webrtc.org>
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23833}

test/fuzzers/BUILD.gn

@@ -505,6 +505,8 @@ webrtc_fuzzer_test("comfort_noise_decoder_fuzzer") {
     "../../modules/audio_coding:cng",
     "../../rtc_base:rtc_base_approved",
   ]
+
+  libfuzzer_options = [ "max_len=5000" ]
 }
 
 webrtc_fuzzer_test("rtp_frame_reference_finder_fuzzer") {

test/fuzzers/comfort_noise_decoder_fuzzer.cc

@@ -50,9 +50,6 @@ void FuzzOneInputTest(rtc::ArrayView<const uint8_t> data) {
 }  // namespace test
 
 void FuzzOneInput(const uint8_t* data, size_t size) {
-  // Limit the input size to 100000 bytes to avoid fuzzer timeout.
-  if (size > 200000)
-    return;
   test::FuzzOneInputTest(rtc::ArrayView<const uint8_t>(data, size));
 }