Revert of Add default options for ThreadSanitizer on Linux. Enable deadlock detection by default.

base/debug/sanitizer_options.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This file contains the default options for various compiler-based dynamic
 // tools.
 
 #include "build/build_config.h"
 
 // Functions returning default options are declared weak in the tools' runtime
@@ skipping 52 matching lines @@
 __attribute__((no_sanitize_address))
 __attribute__((visibility("default")))
 // The function isn't referenced from the executable itself. Make sure it isn't
 // stripped by the linker.
 __attribute__((used))
 const char *__asan_default_options() {
   return kAsanDefaultOptions;
 }
 #endif  // OS_LINUX || OS_MACOSX
 #endif  // ADDRESS_SANITIZER
-
-#if defined(THREAD_SANITIZER) && defined(OS_LINUX)
-// Default options for ThreadSanitizer in various configurations:
-//   detect_deadlocks=1 - enable deadlock (lock inversion) detection.
-//   second_deadlock_stack=1 - more verbose deadlock reports.
-const char kTsanDefaultOptions[] = "detect_deadlocks=1 second_deadlock_stack=1";
-
-extern "C"
-__attribute__((no_sanitize_thread))
-__attribute__((visibility("default")))
-// The function isn't referenced from the executable itself. Make sure it isn't
-// stripped by the linker.
-__attribute__((used))
-const char *__tsan_default_options() {
-  return kTsanDefaultOptions;
-}
-
-#endif  // THREAD_SANITIZER && OS_LINUX