Replace c/b/nss_context by a KeyedService.

chrome/browser/chromeos/ownership/owner_settings_service.h

Index: chrome/browser/chromeos/ownership/owner_settings_service.h
diff --git a/chrome/browser/chromeos/ownership/owner_settings_service.h b/chrome/browser/chromeos/ownership/owner_settings_service.h
index 32a8f953bfe5e623bfa1511041ffd02066760277..c3f4195fd73518cec2a7db88afc496450484673d 100644
--- a/chrome/browser/chromeos/ownership/owner_settings_service.h
+++ b/chrome/browser/chromeos/ownership/owner_settings_service.h
@@ -15,7 +15,6 @@
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/chromeos/settings/device_settings_service.h"
 #include "chromeos/dbus/session_manager_client.h"
-#include "chromeos/tpm_token_loader.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "components/ownership/owner_key_util.h"
 #include "content/public/browser/notification_observer.h"
@@ -34,7 +33,6 @@ class SessionManagerOperation;
 class OwnerSettingsService : public DeviceSettingsService::PrivateKeyDelegate,
                              public KeyedService,
                              public content::NotificationObserver,
-                             public TPMTokenLoader::Observer,
                              public SessionManagerClient::Observer {
  public:
   virtual ~OwnerSettingsService();
@@ -43,6 +41,8 @@ class OwnerSettingsService : public DeviceSettingsService::PrivateKeyDelegate,
     return weak_factory_.GetWeakPtr();
   }
 
+  void OnTPMTokenReady(bool tpm_token_enabled);
+
   // DeviceSettingsService::PrivateKeyDelegate implementation:
   virtual bool IsOwner() OVERRIDE;
   virtual void IsOwnerAsync(const IsOwnerCallback& callback) OVERRIDE;
@@ -63,9 +63,6 @@ class OwnerSettingsService : public DeviceSettingsService::PrivateKeyDelegate,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
-  // TPMTokenLoader::Observer:
-  virtual void OnTPMTokenReady() OVERRIDE;
-
   // SessionManagerClient::Observer:
   virtual void OwnerKeySet(bool success) OVERRIDE;