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 9695bab88b6017152743a947482f05e226837755..5c9466f70a091b3f40bb71557835573118f3c903 100644
--- a/chrome/browser/profiles/profile_io_data.h
+++ b/chrome/browser/profiles/profile_io_data.h
@@ -45,6 +45,10 @@ class ProtocolHandlerRegistry;
 class SigninNamesOnIOThread;
 class SupervisedUserURLFilter;
 
+namespace cert_database {
+class CertDatabaseServiceIOPart;
+}
+
 namespace chrome_browser_net {
 class ResourcePrefetchPredictorObserver;
 }
@@ -209,14 +213,6 @@ class ProfileIOData {
     return transport_security_state_.get();
   }
 
-#if defined(OS_CHROMEOS)
-  std::string username_hash() const {
-    return username_hash_;
-  }
-
-  bool use_system_key_slot() const { return use_system_key_slot_; }
-#endif
-
   Profile::ProfileType profile_type() const {
     return profile_type_;
   }
@@ -333,7 +329,6 @@ 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
@@ -666,8 +661,10 @@ class ProfileIOData {
   // case, the verifier is owned by  |cert_verifier_|. Otherwise, set to NULL.
   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<cert_database::CertDatabaseServiceIOPart> cert_db_io_;
 #endif
 
   mutable scoped_ptr<net::TransportSecurityPersister>