Add new certificateProvider extension API.

chrome/browser/chromeos/certificate_provider/certificate_provider_service_factory.h

+// 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 CHROME_BROWSER_CHROMEOS_CERTIFICATE_PROVIDER_CERTIFICATE_PROVIDER_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_CHROMEOS_CERTIFICATE_PROVIDER_CERTIFICATE_PROVIDER_SERVICE_FACTORY_H_
+
+#include "base/macros.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+template <typename T>
+struct DefaultSingletonTraits;
+
+namespace chromeos {
+
+class CertificateProviderService;
+
+// Factory to create CertificateProviderService.
+class CertificateProviderServiceFactory
+    : public BrowserContextKeyedServiceFactory {
+ public:
+  static CertificateProviderService* GetForBrowserContext(
+      content::BrowserContext* context);

[bartfab (slow), 2015/09/03 17:30:52]

Nit: Forward-declare |content::BrowserContext|.

[pneubeck (no reviews), 2015/09/07 17:21:31]

Done.

+
+  static CertificateProviderServiceFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<CertificateProviderServiceFactory>;
+
+  CertificateProviderServiceFactory();
+  ~CertificateProviderServiceFactory() override;

[bartfab (slow), 2015/09/03 17:30:52]

Nit: Why do you need to override the destructor?

[pneubeck (no reviews), 2015/09/07 17:21:31]

Done.

+
+  // BrowserContextKeyedServiceFactory:
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+  bool ServiceIsNULLWhileTesting() const override;
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(CertificateProviderServiceFactory);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_CERTIFICATE_PROVIDER_CERTIFICATE_PROVIDER_SERVICE_FACTORY_H_