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

Index: chrome/browser/ui/app_list/app_list_service_impl.cc
diff --git a/chrome/browser/ui/app_list/app_list_service_impl.cc b/chrome/browser/ui/app_list/app_list_service_impl.cc
index 3808fee61706a952be5251d787ac969d2737f888..57397697e8fd66d3db61fcb57c1763253a74ae02 100644
--- a/chrome/browser/ui/app_list/app_list_service_impl.cc
+++ b/chrome/browser/ui/app_list/app_list_service_impl.cc
@@ -213,6 +213,7 @@ void AppListServiceImpl::RecordAppListLaunch() {
                             prefs::kAppListLaunchCount,
                             &SendAppListLaunch);
   RecordAppListDiscoverability(local_state_, false);
+  RecordAppListLastLaunch();
 }
 
 // static
@@ -223,6 +224,19 @@ void AppListServiceImpl::RecordAppListAppLaunch() {
 }
 
 // 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;