Unwire the clear on exit preference from the storage systems.

net/base/server_bound_cert_store.h

Index: net/base/server_bound_cert_store.h
diff --git a/net/base/server_bound_cert_store.h b/net/base/server_bound_cert_store.h
index 32b178e6b33b8a5c84733e7d24853fbcfafe7bec..fbcb3ba4b18629f3fa08401689644db74f5ff39a 100644
--- a/net/base/server_bound_cert_store.h
+++ b/net/base/server_bound_cert_store.h
@@ -112,6 +112,10 @@ class NET_EXPORT ServerBoundCertStore {
   // Returns the number of certs in the store.
   // Public only for unit testing.
   virtual int GetCertCount() = 0;
+
+  // When invoked, instructs the store to keep session related data on
+  // destruction.
+  virtual void SaveSessionState() = 0;
 };
 
 }  // namespace net