Purge the App Launcher code from Windows.

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 a0dc299fde27da738d410778b27d9c4336404395..11a7cd727b6551b54ad76f577b3139e05d9ba7a3 100644
--- a/chrome/browser/ui/app_list/app_list_service_impl.cc
+++ b/chrome/browser/ui/app_list/app_list_service_impl.cc
@@ -234,7 +234,6 @@ void AppListServiceImpl::RecordAppListLaunch() {
                             prefs::kAppListLaunchCount,
                             &SendAppListLaunch);
   RecordAppListDiscoverability(local_state_, false);
-  RecordAppListLastLaunch();
 }
 
 // static
@@ -245,19 +244,6 @@ 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;