Revert r257779: "MemorySanitizer: adjust stack size to work around an MSan bug."

base/threading/platform_thread_linux.cc

 // Copyright (c) 2012 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.
 
 #include "base/threading/platform_thread.h"
 
 #include <errno.h>
 #include <sched.h>
 
 #include "base/lazy_instance.h"
@@ skipping 89 matching lines @@
 #endif  //  !defined(OS_NACL)
 }
 
 void InitThreading() {}
 
 void InitOnThread() {}
 
 void TerminateOnThread() {}
 
 size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes) {
-#if !defined(THREAD_SANITIZER) && !defined(MEMORY_SANITIZER)
+#if !defined(THREAD_SANITIZER)
   return 0;
 #else
   // ThreadSanitizer bloats the stack heavily. Evidence has been that the
   // default stack size isn't enough for some browser tests.
-  // MemorySanitizer needs this as a temporary fix for http://crbug.com/353687
   return 2 * (1 << 23);  // 2 times 8192K (the default stack size on Linux).
 #endif
 }
 
 }  // namespace base