Enable system NSS key slot.

chrome/browser/chromeos/net/cert_verify_proc_chromeos.cc

Index: chrome/browser/chromeos/net/cert_verify_proc_chromeos.cc
diff --git a/chrome/browser/chromeos/net/cert_verify_proc_chromeos.cc b/chrome/browser/chromeos/net/cert_verify_proc_chromeos.cc
index b99d98c685d0c8815c1adae69869d8cb011f120e..be4621e23c345e7da66b2c22b953f0a6d55f1495 100644
--- a/chrome/browser/chromeos/net/cert_verify_proc_chromeos.cc
+++ b/chrome/browser/chromeos/net/cert_verify_proc_chromeos.cc
@@ -29,7 +29,10 @@ CertVerifyProcChromeOS::CertVerifyProcChromeOS() {}
 
 CertVerifyProcChromeOS::CertVerifyProcChromeOS(
     crypto::ScopedPK11Slot public_slot) {
-  profile_filter_.Init(public_slot.Pass(), crypto::ScopedPK11Slot());
+  // Only the software slot is passed, since that is the only one where user
+  // trust settings are stored.
+  profile_filter_.Init(
+      public_slot.Pass(), crypto::ScopedPK11Slot(), crypto::ScopedPK11Slot());
 }
 
 CertVerifyProcChromeOS::~CertVerifyProcChromeOS() {}