Require explicit selection of traits for LazyInstance

mojo/public/cpp/bindings/lib/sync_call_restrictions.cc

 // Copyright 2016 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 "mojo/public/cpp/bindings/sync_call_restrictions.h"
 
 #if ENABLE_SYNC_CALL_RESTRICTIONS
 
 #include "base/debug/leak_annotations.h"
 #include "base/lazy_instance.h"
@@ skipping 20 matching lines @@
   }
 
  private:
   SyncCallSettings();
   ~SyncCallSettings();
 
   bool system_defined_value_ = true;
   size_t scoped_allow_count_ = 0;
 };
 
-base::LazyInstance<base::ThreadLocalPointer<SyncCallSettings>>
+base::LazyInstance<base::ThreadLocalPointer<SyncCallSettings>>::DestructorAtExit
     g_sync_call_settings = LAZY_INSTANCE_INITIALIZER;
 
 // static
 SyncCallSettings* SyncCallSettings::current() {
   SyncCallSettings* result = g_sync_call_settings.Pointer()->Get();
   if (!result) {
     result = new SyncCallSettings();
     ANNOTATE_LEAKING_OBJECT_PTR(result);
     DCHECK_EQ(result, g_sync_call_settings.Pointer()->Get());
   }
@@ skipping 32 matching lines @@
 }
 
 // static
 void SyncCallRestrictions::DecreaseScopedAllowCount() {
   SyncCallSettings::current()->DecreaseScopedAllowCount();
 }
 
 }  // namespace mojo
 
 #endif  // ENABLE_SYNC_CALL_RESTRICTIONS