Purge the App Launcher code from Windows.

chrome/browser/ui/app_list/app_list_service_impl.cc

 // Copyright 2013 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/ui/app_list/app_list_service_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string>
 #include <utility>
@@ skipping 216 matching lines @@
       profile_name != base::FilePath(chrome::kSystemProfileDir).AsUTF8Unsafe();
 }
 
 }  // namespace
 
 void AppListServiceImpl::RecordAppListLaunch() {
   RecordDailyEventFrequency(prefs::kLastAppListLaunchPing,
                             prefs::kAppListLaunchCount,
                             &SendAppListLaunch);
   RecordAppListDiscoverability(local_state_, false);
-  RecordAppListLastLaunch();
 }
 
 // static
 void AppListServiceImpl::RecordAppListAppLaunch() {
   RecordDailyEventFrequency(prefs::kLastAppListAppLaunchPing,
                             prefs::kAppListAppLaunchCount,
                             &SendAppListAppLaunch);
 }
 
 // static
-void AppListServiceImpl::RecordAppListLastLaunch() {
-  if (!g_browser_process)
-    return;  // In a unit test.
-
-  PrefService* local_state = g_browser_process->local_state();
-  if (!local_state)
-    return;  // In a unit test.
-
-  local_state->SetInt64(prefs::kAppListLastLaunchTime,
-                        base::Time::Now().ToInternalValue());
-}
-
-// static
 void AppListServiceImpl::SendAppListStats() {
   if (!g_browser_process || g_browser_process->IsShuttingDown())
     return;
 
   SendDailyEventFrequency(prefs::kLastAppListLaunchPing,
                           prefs::kAppListLaunchCount,
                           &SendAppListLaunch);
   SendDailyEventFrequency(prefs::kLastAppListAppLaunchPing,
                           prefs::kAppListAppLaunchCount,
                           &SendAppListAppLaunch);
@@ skipping 180 matching lines @@
 
   if (!base::ThreadTaskRunnerHandle::IsSet())
     return;  // In a unit test.
 
   // Send app list usage stats after a delay.
   const int kSendUsageStatsDelay = 5;
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, base::Bind(&AppListServiceImpl::SendAppListStats),
       base::TimeDelta::FromSeconds(kSendUsageStatsDelay));
 }