Replace c/b/nss_context by a KeyedService.

chrome/browser/profiles/profile_io_data.h

Index: chrome/browser/profiles/profile_io_data.h
diff --git a/chrome/browser/profiles/profile_io_data.h b/chrome/browser/profiles/profile_io_data.h
index b43b0d467dfd458cd78553d3dec2b98c2c014a60..748d855a38fe1f05f37397d022ad81d054244fe5 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -42,6 +42,8 @@ class ProtocolHandlerRegistry;
 class SigninNamesOnIOThread;
 class SupervisedUserURLFilter;
 
+class CertDatabaseServiceIOPart;
+
 namespace extensions {
 class InfoMap;
 }
@@ -219,8 +221,6 @@ class ProfileIOData {
   std::string username_hash() const {

[mattm, 2014/09/05 07:35:29]

I think this can be removed too

[pneubeck (no reviews), 2014/09/05 08:04:56]

Yes, I've removed it now from ProfileIOData.
But sadly we can't remove it from ProfileParams yet, because we still use it in
ProfileIOData::Init:
 ..public_slot.. =
crypto::GetPublicSlotForChromeOSUser(profile_params_->username_hash)
  ... new chromeos::CertVerifyProcChromeOS(public_slot.Pass()))

The new ServiceIOPart can't be used in this case without further adaptions,
because CertVerifyProcChromeOS expects the public_slot to be available at
construction time.

     return username_hash_;
   }
-
-  bool use_system_key_slot() const { return use_system_key_slot_; }
 #endif
 
   Profile::ProfileType profile_type() const {
@@ -334,7 +334,6 @@ class ProfileIOData {
 
 #if defined(OS_CHROMEOS)
     std::string username_hash;
-    bool use_system_key_slot;
 #endif
 
     // The profile this struct was populated from. It's passed as a void* to
@@ -593,7 +592,10 @@ class ProfileIOData {
   mutable policy::PolicyCertVerifier* policy_cert_verifier_;
   mutable scoped_ptr<net::CertVerifier> cert_verifier_;
   mutable std::string username_hash_;
-  mutable bool use_system_key_slot_;
+#endif
+
+#if defined(USE_NSS)
+  mutable base::WeakPtr<CertDatabaseServiceIOPart> cert_db_io_;
 #endif
 
   mutable scoped_ptr<net::TransportSecurityPersister>