[Smart Lock] Add UMA metrics to measure duration of unlock.

chrome/browser/signin/easy_unlock_service.h

 // Copyright 2014 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_SIGNIN_EASY_UNLOCK_SERVICE_H_
 #define CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 214 matching lines @@
 
   // Service type specific tests for whether the service is allowed. Returns
   // false if service is not allowed. If true is returned, the service may still
   // not be allowed if common tests fail (e.g. if Bluetooth is not available).
   virtual bool IsAllowedInternal() const = 0;
 
   // Called while processing a user gesture to unlock the screen using Easy
   // Unlock, just before the screen is unlocked.
   virtual void OnWillFinalizeUnlock(bool success) = 0;
 
+  // Called when the local device resumes after a suspend.
+  virtual void OnSuspendDone() = 0;
+
   // KeyedService override:
   void Shutdown() override;
 
   // Exposes the profile to which the service is attached to subclasses.
   const Profile* profile() const { return profile_; }
   Profile* profile() { return profile_; }
 
   // Opens an Easy Unlock Setup app window.
   void OpenSetupApp();
 
@@ skipping 93 matching lines @@
   bool tpm_key_checked_;
 
   ObserverList<EasyUnlockServiceObserver> observers_;
 
   base::WeakPtrFactory<EasyUnlockService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockService);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_H_