Fix fuzzer breakage in Chromium.

webrtc/test/fuzzers/webrtc_fuzzer_main.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
-#include "webrtc/base/logging.h"
 
 // This file is intended to provide a common interface for fuzzing functions, so
 // whether we're running fuzzing under libFuzzer or DrFuzz the webrtc functions
 // can remain the same.
 // TODO(pbos): Implement FuzzOneInput() for more than one platform (currently
 // libFuzzer).
 
+#include "webrtc/base/logging.h"
+
+namespace {
+bool g_initialized = false;
+void InitializeWebRtcFuzzDefaults() {
+  if (g_initialized)
+    return;
+  // Remove default logging to prevent huge slowdowns.
+  // TODO(pbos): Disable in Chromium: http://crbug.com/561667
+#if !defined(WEBRTC_CHROMIUM_BUILD)

[Henrik Grunell WebRTC, 2015/11/26 12:06:00]

Do you plan to modify this function when disabling in Chromium? Otherwise, this
function shouldn't be called at all when in Chromium, right?

[pbos-webrtc, 2015/11/26 12:23:42]

This exact code should work in Chromium, but currently doesn't, so when the
linked bug is fixed I'll remove the ifdefs.

[Henrik Grunell WebRTC, 2015/11/26 12:59:58]

I see. It wasn't really clear reading the todo. :)

+  rtc::LogMessage::LogToDebug(rtc::LS_NONE);
+#endif  // !defined(WEBRTC_CHROMIUM_BUILD)
+  g_initialized = true;
+}
+}
+
 namespace webrtc {
 extern void FuzzOneInput(const uint8_t* data, size_t size);
 }  // namespace webrtc
 
 extern "C" int LLVMFuzzerTestOneInput(const unsigned char *data, size_t size) {
-  // TODO(pbos): Figure out whether this can be moved to common startup code and
-  // not be done per-input.
-  // Remove default logging to prevent huge slowdowns.
-  rtc::LogMessage::LogToDebug(rtc::LS_NONE);
+  InitializeWebRtcFuzzDefaults();
   webrtc::FuzzOneInput(data, size);
   return 0;
 }