Revert of Assert sequence validity on non-thread-safe RefCount manipulations (2)

base/memory/ref_counted.cc

Index: base/memory/ref_counted.cc
diff --git a/base/memory/ref_counted.cc b/base/memory/ref_counted.cc
index b6c888dcc0cbfb3ef829ffeb538b22cadc7ff72d..46bbd7ad858b152ec8a29d1b5060c24fb466be09 100644
--- a/base/memory/ref_counted.cc
+++ b/base/memory/ref_counted.cc
@@ -3,17 +3,9 @@
 // found in the LICENSE file.
 
 #include "base/memory/ref_counted.h"
-
 #include "base/threading/thread_collision_warner.h"
 
 namespace base {
-namespace {
-
-#if DCHECK_IS_ON()
-AtomicRefCount g_cross_thread_ref_count_access_allow_count = 0;
-#endif
-
-}  // namespace
 
 namespace subtle {
 
@@ -51,23 +43,6 @@
   return false;
 }
 
-#if DCHECK_IS_ON()
-bool RefCountedBase::CalledOnValidSequence() const {
-  return sequence_checker_.CalledOnValidSequence() ||
-         !AtomicRefCountIsZero(&g_cross_thread_ref_count_access_allow_count);
-}
-#endif
-
 }  // namespace subtle
 
-#if DCHECK_IS_ON()
-ScopedAllowCrossThreadRefCountAccess::ScopedAllowCrossThreadRefCountAccess() {
-  AtomicRefCountInc(&g_cross_thread_ref_count_access_allow_count);
-}
-
-ScopedAllowCrossThreadRefCountAccess::~ScopedAllowCrossThreadRefCountAccess() {
-  AtomicRefCountDec(&g_cross_thread_ref_count_access_allow_count);
-}
-#endif
-
 }  // namespace base