Don't use RSAPrivateKey in NSS integration code.

components/ownership/BUILD.gn

Index: components/ownership/BUILD.gn
diff --git a/components/ownership/BUILD.gn b/components/ownership/BUILD.gn
index 1bca927b1e0e7539949095b4b7023b62fe908593..cdaf227552859275307bc618dcfe5451c8e7fb90 100644
--- a/components/ownership/BUILD.gn
+++ b/components/ownership/BUILD.gn
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 
 component("ownership") {
@@ -29,6 +30,10 @@ component("ownership") {
   if (enable_configuration_policy) {
     deps += [ "//components/policy" ]
   }
+
+  if (use_nss_certs) {
+    deps += [ "//crypto:platform" ]
+  }
 }
 
 source_set("unit_tests") {