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

content/browser/browsing_instance.cc

Index: content/browser/browsing_instance.cc
diff --git a/content/browser/browsing_instance.cc b/content/browser/browsing_instance.cc
index d52d6e06f5056c9e73f5fafe2f86df1d228aa611..eec9d8d6f7bd35f3868f4bd4bb5a3e7ac124f241 100644
--- a/content/browser/browsing_instance.cc
+++ b/content/browser/browsing_instance.cc
@@ -14,8 +14,10 @@
 #include "content/public/common/url_constants.h"
 
 // static
-BrowsingInstance::ContextSiteInstanceMap
-    BrowsingInstance::context_site_instance_map_;
+base::LazyInstance<
+    BrowsingInstance::ContextSiteInstanceMap,
+    base::LeakyLazyInstanceTraits<BrowsingInstance::ContextSiteInstanceMap> >
+        BrowsingInstance::context_site_instance_map_(base::LINKER_INITIALIZED);
 
 BrowsingInstance::BrowsingInstance(content::BrowserContext* browser_context)
     : browser_context_(browser_context) {
@@ -60,7 +62,7 @@ BrowsingInstance::SiteInstanceMap* BrowsingInstance::GetSiteInstanceMap(
 
   // Otherwise, process-per-site is in use, at least for this URL.  Look up the
   // global map for this context, creating an entry if necessary.
-  return &context_site_instance_map_[browser_context];
+  return &context_site_instance_map_.Get()[browser_context];
 }
 
 bool BrowsingInstance::HasSiteInstance(const GURL& url) {
@@ -129,7 +131,9 @@ void BrowsingInstance::UnregisterSiteInstance(SiteInstance* site_instance) {
   if (!RemoveSiteInstanceFromMap(&site_instance_map_, site, site_instance)) {
     // Wasn't in our local map, so look in the static per-browser context map.
     RemoveSiteInstanceFromMap(
-        &context_site_instance_map_[browser_context_], site, site_instance);
+        &context_site_instance_map_.Get()[browser_context_],
+        site,
+        site_instance);
   }
 }