content: Remove 16 exit time destructors and 15 static initializers.

content/browser/browsing_instance.h

Index: content/browser/browsing_instance.h
diff --git a/content/browser/browsing_instance.h b/content/browser/browsing_instance.h
index 5d7de84860bab82b56751ee23624d6aeaa5a38ed..71c4695886f59fcd0d4cf775fd5f197e199f33e9 100644
--- a/content/browser/browsing_instance.h
+++ b/content/browser/browsing_instance.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include "base/hash_tables.h"
+#include "base/lazy_instance.h"
 #include "base/memory/ref_counted.h"
 #include "content/common/content_export.h"
 
@@ -132,7 +133,10 @@ class CONTENT_EXPORT BrowsingInstance
   SiteInstanceMap site_instance_map_;
 
   // Global map of BrowserContext to SiteInstanceMap, for process-per-site.
-  static ContextSiteInstanceMap context_site_instance_map_;
+  static base::LazyInstance<
+      ContextSiteInstanceMap,
+      base::LeakyLazyInstanceTraits<ContextSiteInstanceMap> >
+          context_site_instance_map_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingInstance);
 };