Require explicit selection of traits for LazyInstance

extensions/browser/guest_view/guest_view_events.cc

 // Copyright 2015 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 "extensions/browser/guest_view/guest_view_events.h"
 
 #include <map>
 
 #include "base/lazy_instance.h"
 #include "base/macros.h"
@@ skipping 80 matching lines @@
     auto value = values_.find(event_name);
     return value != values_.end() ? value->second : events::UNKNOWN;
   }
 
  private:
   std::map<std::string, events::HistogramValue> values_;
 
   DISALLOW_COPY_AND_ASSIGN(EventMap);
 };
 
-base::LazyInstance<EventMap> g_event_map = LAZY_INSTANCE_INITIALIZER;
+base::LazyInstance<EventMap>::DestructorAtExit g_event_map =
+    LAZY_INSTANCE_INITIALIZER;
 
 }  // namespace
 
 events::HistogramValue GetEventHistogramValue(const std::string& event_name) {
   return g_event_map.Get().Get(event_name);
 }
 
 }  // namespace guest_view_events
 }  // namespace extensions