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

chrome/browser/signin/easy_unlock_screenlock_state_handler.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_SCREENLOCK_STATE_HANDLER_H_
 #define CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SCREENLOCK_STATE_HANDLER_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
@@ skipping 79 matching lines @@
 
   // Updates the screenlock state.
   void SetHardlockState(HardlockState new_state);
 
   // Shows the hardlock UI if the hardlock_state_ is not NO_HARDLOCK.
   void MaybeShowHardlockUI();
 
   // Marks the current screenlock state as the one for trial Easy Unlock run.
   void SetTrialRun();
 
+  // Records that the user clicked on the lock icon during the trial run
+  // initiated by the Easy Unlock app.
+  void RecordClickOnLockIcon();
+
   State state() const { return state_; }
 
  private:
   // ScreenlockBridge::Observer:
   void OnScreenDidLock(
       ScreenlockBridge::LockHandler::ScreenType screen_type) override;
   void OnScreenDidUnlock(
       ScreenlockBridge::LockHandler::ScreenType screen_type) override;
   void OnFocusedUserChanged(const std::string& user_id) override;
 
   // Forces refresh of the Easy Unlock screenlock UI.
   void RefreshScreenlockState();
 
   void ShowHardlockUI();
 
   // Updates icon's tooltip options.
-  // |trial_run|: Whether the trial Easy Unlock run is in progress.
   void UpdateTooltipOptions(
-      bool trial_run,
       ScreenlockBridge::UserPodCustomIconOptions* icon_options);
 
   // Gets the name to be used for the device. The name depends on the device
   // type (example values: Chromebook and Chromebox).
   base::string16 GetDeviceName();
 
   // Updates the screenlock auth type if it has to be changed.
   void UpdateScreenlockAuthType();
 
   State state_;
   std::string user_email_;
   ScreenlockBridge* screenlock_bridge_;
 
   // State of hardlock.
   HardlockState hardlock_state_;
   bool hardlock_ui_shown_;
 
   // Whether this is the trial Easy Unlock run. If this is the case, a
   // tutorial message should be shown and hard-locking be disabled. The trial
   // run should be set if the screen was locked by the Easy Unlock setup app.
   bool is_trial_run_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockScreenlockStateHandler);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SCREENLOCK_STATE_HANDLER_H_