Disable noisy logging from net_url_request_fuzzer.

net/url_request/url_request_fuzzer.cc

Index: net/url_request/url_request_fuzzer.cc
diff --git a/net/url_request/url_request_fuzzer.cc b/net/url_request/url_request_fuzzer.cc
index 788e3a7a54220415808fabefb949f22e09bb57f9..205697ac20b36fc7bbd7b1f200b3d4ea010010bb 100644
--- a/net/url_request/url_request_fuzzer.cc
+++ b/net/url_request/url_request_fuzzer.cc
@@ -9,6 +9,7 @@
 
 #include <memory>
 
+#include "base/logging.h"
 #include "base/run_loop.h"
 #include "base/test/fuzzed_data_provider.h"
 #include "net/base/request_priority.h"
@@ -18,6 +19,16 @@
 #include "net/url_request/url_request_test_util.h"
 #include "url/gurl.h"
 
+struct Environment {
+  Environment() {
+    // Disable noisy logging as per "libFuzzer in Chrome" documentation:
+    // testing/libfuzzer/getting_started.md#Disable-noisy-error-message-logging.
+    logging::SetMinLogLevel(logging::LOG_FATAL);
+  }
+};
+
+Environment* env = new Environment();
+
 // Integration fuzzer for URLRequest's handling of HTTP requests. Can follow
 // redirects, both on the same server (using a new socket or the old one) and
 // across servers.