Don't warmup the app list if it hasn't been used in the past 28 days. [Win]

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 <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 195 matching lines @@
                             AppListService::ENABLE_NUM_ENABLE_SOURCES);
 }
 
 }  // 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::MessageLoop::current())
     return;  // In a unit test.
 
   // Send app list usage stats after a delay.
   const int kSendUsageStatsDelay = 5;
   base::MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&AppListServiceImpl::SendAppListStats),
       base::TimeDelta::FromSeconds(kSendUsageStatsDelay));
 }