[Smart Lock] Measure clicks on the lock icon during Easy Unlock's trial run.

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 175 matching lines @@
   void HandleAuthFailure(const std::string& user_id);
 
   // Checks the consistency between pairing data and cryptohome keys. Set
   // hardlock state if the two do not match.
   void CheckCryptohomeKeysAndMaybeHardlock();
 
   // Marks the Easy Unlock screen lock state as the one associated with the
   // trial run initiated by Easy Unlock app.
   void SetTrialRun();
 
+  // Records that the user clicked on the lock icon during the trial run
+  // initiated by the Easy Unlock app.
+  void RecordClickOnLockIcon();
+
   void AddObserver(EasyUnlockServiceObserver* observer);
   void RemoveObserver(EasyUnlockServiceObserver* observer);
 
  protected:
   explicit EasyUnlockService(Profile* profile);
   ~EasyUnlockService() override;
 
   // Does a service type specific initialization.
   virtual void InitializeInternal() = 0;
 
@@ skipping 114 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_