Add an SignedCertificateTimetampStore, making SignedCertificateTimestamp be refcounted to aid.

content/browser/signed_certificate_timestamp_store_impl.h

+// Copyright 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 CONTENT_BROWSER_SIGNED_CERTIFICATE_STORE_IMPL_H_
+#define CONTENT_BROWSER_SIGNED_CERTIFICATE_STORE_IMPL_H_
+
+#include "base/memory/singleton.h"

[wtc, 2013/11/19 21:41:44]

Nit: based on the comments in "base/memory/singleton.h", we should be able to
get away with just a forward declaration in this .h file, and only move this
#include to the .cc file.

The forward declaration we need here is:

template <typename T> struct DefaultSingletonTraits;

[alcutter, 2013/11/21 10:48:19]

Done.

+#include "content/browser/renderer_data_memoizing_store.h"
+#include "content/public/browser/signed_certificate_timestamp_store.h"
+#include "net/cert/signed_certificate_timestamp.h"
+
+namespace content {
+
+class SignedCertificateTimestampStoreImpl
+    : public SignedCertificateTimestampStore {
+ public:
+  // Returns the singleton instance of the SignedCertificateTimestampStore.
+  static SignedCertificateTimestampStoreImpl* GetInstance();
+
+  // SignedCertificateTimestampStore implementation:
+  virtual int Store(
+      net::ct::SignedCertificateTimestamp* sct,
+      int render_process_host_id) OVERRIDE;
+  virtual bool Retrieve(
+      int sct_id,
+      scoped_refptr<net::ct::SignedCertificateTimestamp>* sct) OVERRIDE;
+
+ private:
+  friend struct DefaultSingletonTraits<SignedCertificateTimestampStoreImpl>;
+
+  SignedCertificateTimestampStoreImpl();
+  virtual ~SignedCertificateTimestampStoreImpl();
+
+  RendererDataMemoizingStore<net::ct::SignedCertificateTimestamp> store_;
+
+  DISALLOW_COPY_AND_ASSIGN(SignedCertificateTimestampStoreImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_SIGNED_CERTIFICATE_STORE_IMPL_H_