Revert of Roll clang 277962:278861

base/threading/thread_unittest.cc

Index: base/threading/thread_unittest.cc
diff --git a/base/threading/thread_unittest.cc b/base/threading/thread_unittest.cc
index 7067e8e005c7e98b078a15178c97a37dbb5f482c..481ac4b8d8614c2636b509ee2dd3afb119f07f6f 100644
--- a/base/threading/thread_unittest.cc
+++ b/base/threading/thread_unittest.cc
@@ -137,9 +137,8 @@
   // Ensure that the thread can work with only 12 kb and still process a
   // message.
   Thread::Options options;
-#if defined(ADDRESS_SANITIZER) || (defined(OS_IOS) && !defined(NDEBUG))
-  // ASan bloats the stack variables and overflows the 12 kb stack. Debug iOS
-  // builds also grow the stack too much.
+#if defined(ADDRESS_SANITIZER)
+  // ASan bloats the stack variables and overflows the 12 kb stack.
   options.stack_size = 24*1024;
 #else
   options.stack_size = 12*1024;