Upstream most of ios/web/net

ios/web/public/cert_store.h

Index: ios/web/public/cert_store.h
diff --git a/ios/web/public/cert_store.h b/ios/web/public/cert_store.h
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+// Copyright 2015 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 IOS_WEB_PUBLIC_BROWSER_CERT_STORE_H_
+#define IOS_WEB_PUBLIC_BROWSER_CERT_STORE_H_
+
+#include "base/memory/ref_counted.h"
+
+namespace net {
+class X509Certificate;
+}
+
+namespace web {
+
+// The purpose of the cert store is to provide an easy way to store/retrieve
+// X509Certificate objects. When stored, an X509Certificate object is
+// associated with a group, which can be cleared when it is no longer useful.
+// It can be accessed from the UI and IO threads (it is thread-safe).
+// Note that the cert ids will overflow if more than 2^32 - 1 certs are
+// registered in one browsing session (which is highly unlikely to happen).
+class CertStore {
+ public:
+  // Returns the singleton instance of the CertStore.
+  static CertStore* GetInstance();
+
+  // Stores the specified cert and returns the id associated with it.  The cert
+  // is associated to the specified RequestTracker.
+  // When all the RequestTrackers associated with a cert have been closed, the
+  // cert is removed from the store.
+  // Note: ids starts at 1.
+  virtual int StoreCert(net::X509Certificate* cert, int group_id) = 0;
+
+  // Tries to retrieve the previously stored cert associated with the specified
+  // |cert_id|. Returns whether the cert could be found, and, if |cert| is
+  // non-nullptr, copies it in.
+  virtual bool RetrieveCert(int cert_id,
+                            scoped_refptr<net::X509Certificate>* cert) = 0;
+
+  // Removes all the certs associated with the specified groups from the store.
+  virtual void RemoveCertsForGroup(int group_id) = 0;
+
+ protected:
+  virtual ~CertStore() {}
+};
+
+}  // namespace web
+
+#endif  // IOS_WEB_PUBLIC_BROWSER_CERT_STORE_H_