Initialize per-ChromeOS-user NSS slots and provide the functions to access them.

chrome/browser/net/nss_context.h

Index: chrome/browser/net/nss_context.h
diff --git a/chrome/browser/net/nss_context.h b/chrome/browser/net/nss_context.h
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+++ b/chrome/browser/net/nss_context.h
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+// 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"
+#include "base/compiler_specific.h"
+#include "crypto/scoped_nss_types.h"
+
+namespace content {
+class ResourceContext;
+}  // namespace content
+
+// Returns a reference to the public slot for the user associated with
+// |context|.  Should be called only on the IO thread.
+crypto::ScopedPK11Slot GetPublicNSSKeySlotForResourceContext(
+    content::ResourceContext* context);
+
+// Returns a reference to the private slot for the user associated with
+// |context|, if it is loaded. If it is not loaded and |callback| is non-null,
+// the |callback| will be run once the slot is loaded.
+// Should be called only on the IO thread.
+crypto::ScopedPK11Slot GetPrivateNSSKeySlotForResourceContext(
+    content::ResourceContext* context,
+    const base::Callback<void(crypto::ScopedPK11Slot)>& callback)
+    WARN_UNUSED_RESULT;
+
+#endif  // CHROME_BROWSER_NET_NSS_CONTEXT_H_