Add FingerprintUnlock KeyedService for each profile

chrome/browser/chromeos/login/quick_unlock/fingerprint_unlock_factory.h

Index: chrome/browser/chromeos/login/quick_unlock/fingerprint_unlock_factory.h
diff --git a/chrome/browser/chromeos/login/quick_unlock/fingerprint_unlock_factory.h b/chrome/browser/chromeos/login/quick_unlock/fingerprint_unlock_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..765fc8f2f79cf0fbfed8c3ac86990d569f852fc3
--- /dev/null
+++ b/chrome/browser/chromeos/login/quick_unlock/fingerprint_unlock_factory.h
@@ -0,0 +1,57 @@
+// Copyright 2017 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_LOGIN_QUICK_UNLOCK_FINGERPRINT_UNLOCK_FACTORY_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_QUICK_UNLOCK_FINGERPRINT_UNLOCK_FACTORY_H_
+
+#include "base/memory/singleton.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+#include "components/signin/core/account_id/account_id.h"
+
+class Profile;
+
+namespace user_manager {
+class User;
+}
+
+namespace chromeos {
+namespace quick_unlock {
+
+class FingerprintUnlock;
+
+// Singleton that owns all FingerprintUnlock instances and associates them with
+// Profiles. Listens for the Profile's destruction notification and cleans up
+// the associated FingerprintUnlock.
+class FingerprintUnlockFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  // Returns the FingerprintUnlock instance for |profile|.
+  static FingerprintUnlock* GetForProfile(Profile* profile);
+
+  // Helper method that finds the FingerprintUnlock instance for |user|. This
+  // returns GetForProfile with the profile associated with |user|.
+  static FingerprintUnlock* GetForUser(const user_manager::User* user);
+
+  // Helper method that returns the FingerprintUnlock instance for |account_id|.
+  // This returns GetForProfile with the profile associated with |account_id|.
+  static FingerprintUnlock* GetForAccountId(const AccountId& account_id);
+
+  static FingerprintUnlockFactory* GetInstance();
+
+ private:
+  friend struct base::DefaultSingletonTraits<FingerprintUnlockFactory>;
+
+  FingerprintUnlockFactory();
+  ~FingerprintUnlockFactory() override;
+
+  // BrowserContextKeyedServiceFactory:
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* profile) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(FingerprintUnlockFactory);
+};
+
+}  // namespace quick_unlock
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_QUICK_UNLOCK_FINGERPRINT_UNLOCK_FACTORY_H_