Revert of Roll clang 277962:278861

base/threading/thread_unittest.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/thread.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 119 matching lines @@
   event->Signal();
 }
 
 }  // namespace
 
 TEST_F(ThreadTest, StartWithOptions_StackSize) {
   Thread a("StartWithStackSize");
   // 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;
 #endif
   EXPECT_TRUE(a.StartWithOptions(options));
   EXPECT_TRUE(a.message_loop());
   EXPECT_TRUE(a.IsRunning());
 
   base::WaitableEvent event(base::WaitableEvent::ResetPolicy::AUTOMATIC,
                             base::WaitableEvent::InitialState::NOT_SIGNALED);
@@ skipping 321 matching lines @@
 
   a.Stop();
   EXPECT_FALSE(a.message_loop());
   EXPECT_FALSE(a.IsRunning());
 
   // Confirm that running any remaining tasks posted from Stop() goes smoothly
   // (e.g. https://codereview.chromium.org/2135413003/#ps300001 crashed if
   // StopSoon() posted Thread::ThreadQuitHelper() while |run_loop_| was null).
   base::RunLoop().RunUntilIdle();
 }