Make ServerBoundCertStore interface async, move SQLiteServerBoundCertStore load onto DB thread.

net/base/server_bound_cert_service.h

Index: net/base/server_bound_cert_service.h
diff --git a/net/base/server_bound_cert_service.h b/net/base/server_bound_cert_service.h
index e02fbb8a4a4ad43f6a3b660a571e3e37a7303822..98f1e8e00f24dd5b02c55cac24a007976f8363d1 100644
--- a/net/base/server_bound_cert_service.h
+++ b/net/base/server_bound_cert_service.h
@@ -104,9 +104,20 @@ class NET_EXPORT ServerBoundCertService
   uint64 inflight_joins() const { return inflight_joins_; }
 
  private:
-  void HandleResult(const std::string& server_identifier,
-                    int error,
-                    scoped_ptr<ServerBoundCertStore::ServerBoundCert> cert);
+  void GotServerBoundCert(const std::string& server_identifier,
+                          SSLClientCertType type,
+                          base::Time expiration_time,
+                          const std::string& key,
+                          const std::string& cert);
+  void GeneratedServerBoundCert(
+      const std::string& server_identifier,
+      int error,
+      scoped_ptr<ServerBoundCertStore::ServerBoundCert> cert);
+  void HandleResult(int error,
+                    const std::string& server_identifier,
+                    SSLClientCertType type,
+                    const std::string& private_key,
+                    const std::string& cert);
 
   scoped_ptr<ServerBoundCertStore> server_bound_cert_store_;
   scoped_refptr<base::TaskRunner> task_runner_;