comfort_noise_decoder_fuzzer: limit the fuzzer input size to avoid timeout

The length of the fuzzer input can sometimes be really long (more than
1000000 bytes), and this take a very long time to execute. Typically,
the fuzzer times out instead. This change limits the used length of
the fuzzer to 200000 bytes.

NOTRY=TRUE

Bug: chromium:802149
Change-Id: Ia9d2f080602bba8ff70c5f0575bb9ecfa99c537c
Reviewed-on: https://webrtc-review.googlesource.com/57581
Commit-Queue: Henrik Lundin <henrik.lundin@webrtc.org>
Reviewed-by: Alex Loiko <aleloi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22183}

test/fuzzers/comfort_noise_decoder_fuzzer.cc

@@ -47,6 +47,9 @@ 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));
 }