Remove the deprecated NSSCertDatabase::GetInstance() .

chrome/browser/net/nss_context.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_NET_NSS_CONTEXT_H_
 #define CHROME_BROWSER_NET_NSS_CONTEXT_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 22 matching lines @@
 crypto::ScopedPK11Slot GetPrivateNSSKeySlotForResourceContext(
     content::ResourceContext* context,
     const base::Callback<void(crypto::ScopedPK11Slot)>& callback)
     WARN_UNUSED_RESULT;
 
 // Returns a pointer to the NSSCertDatabase for the user associated with
 // |context|, if it is ready. If it is not ready and |callback| is non-null, the
 // |callback| will be run once the DB is initialized. Ownership is not
 // transferred, but the caller may save the pointer, which will remain valid for
 // the lifetime of the ResourceContext.
-// Should be called only on the IO thread.
+// Must be called only on the IO thread.
 net::NSSCertDatabase* GetNSSCertDatabaseForResourceContext(
     content::ResourceContext* context,
     const base::Callback<void(net::NSSCertDatabase*)>& callback)
     WARN_UNUSED_RESULT;
 
 // Gets a pointer to the NSSCertDatabase for the user associated with |context|.
 // It's a wrapper around |GetNSSCertDatabaseForResourceContext| which makes
 // sure it's called on IO thread (with |profile|'s resource context). The
 // callback will be called on the originating message loop.
 // It's accessing profile, so it should be called on the UI thread.
 void GetNSSCertDatabaseForProfile(
     Profile* profile,
     const base::Callback<void(net::NSSCertDatabase*)>& callback);
 
 #endif  // CHROME_BROWSER_NET_NSS_CONTEXT_H_