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

chrome/browser/signin/easy_unlock_service.cc

 // 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.
 
 #include "chrome/browser/signin/easy_unlock_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 482 matching lines @@
   key_manager->GetDeviceDataList(
       chromeos::UserContext(user_id),
       base::Bind(&EasyUnlockService::OnCryptohomeKeysFetchedForChecking,
                  weak_ptr_factory_.GetWeakPtr(),
                  user_id,
                  paired_devices));
 #endif
 }
 
 void EasyUnlockService::SetTrialRun() {
-  DCHECK(GetType() == TYPE_REGULAR);
+  DCHECK_EQ(GetType(), TYPE_REGULAR);
 
   EasyUnlockScreenlockStateHandler* handler = GetScreenlockStateHandler();
   if (handler)
     handler->SetTrialRun();
 }
 
+void EasyUnlockService::RecordClickOnLockIcon() {
+  if (screenlock_state_handler_)
+    screenlock_state_handler_->RecordClickOnLockIcon();
+}
+
 void EasyUnlockService::AddObserver(EasyUnlockServiceObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void EasyUnlockService::RemoveObserver(EasyUnlockServiceObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void  EasyUnlockService::Shutdown() {
   if (shut_down_)
@@ skipping 224 matching lines @@
 
   // TODO(tbarzic): Set check_private_key only if previous sign-in attempt
   // failed.
   EasyUnlockTpmKeyManagerFactory::GetInstance()->Get(profile_)
       ->PrepareTpmKey(true /* check_private_key */,
                       base::Closure());
 #endif  // defined(OS_CHROMEOS)
 
   tpm_key_checked_ = true;
 }