Require explicit selection of traits for LazyInstance

ui/base/clipboard/clipboard.h

Index: ui/base/clipboard/clipboard.h
diff --git a/ui/base/clipboard/clipboard.h b/ui/base/clipboard/clipboard.h
index ff7c04a206ad455c081d5ff4ec6ea28faf47c3a9..e25f892466d76afdcb74c6713db377d7284b3659 100644
--- a/ui/base/clipboard/clipboard.h
+++ b/ui/base/clipboard/clipboard.h
@@ -334,12 +334,13 @@ class UI_BASE_EXPORT Clipboard : NON_EXPORTED_BASE(public base::ThreadChecker) {
   // is done (in the unit test case), but a user (like content) can set which
   // threads are allowed to call this method.
   typedef std::vector<base::PlatformThreadId> AllowedThreadsVector;
-  static base::LazyInstance<AllowedThreadsVector> allowed_threads_;
+  static base::LazyInstance<AllowedThreadsVector>::DestructorAtExit
+      allowed_threads_;
 
   // Mapping from threads to clipboard objects.
   typedef std::map<base::PlatformThreadId, std::unique_ptr<Clipboard>>
       ClipboardMap;
-  static base::LazyInstance<ClipboardMap> clipboard_map_;
+  static base::LazyInstance<ClipboardMap>::DestructorAtExit clipboard_map_;
 
   // Mutex that controls access to |g_clipboard_map|.
   static base::LazyInstance<base::Lock>::Leaky clipboard_map_lock_;