Purge the App Launcher code from Windows.

chrome/browser/ui/app_list/app_list_service.cc

Index: chrome/browser/ui/app_list/app_list_service.cc
diff --git a/chrome/browser/ui/app_list/app_list_service.cc b/chrome/browser/ui/app_list/app_list_service.cc
index e9ab06d4f3bd3e3030f10fdf1fab5f03a51c05a2..5464c7661e26fd3c478b971a71081962b2b2e2b8 100644
--- a/chrome/browser/ui/app_list/app_list_service.cc
+++ b/chrome/browser/ui/app_list/app_list_service.cc
@@ -45,7 +45,7 @@ base::Time GetOriginalProcessStartTime(const base::CommandLine& command_line) {
 
 // base::CurrentProcessInfo::CreationTime() is only defined on some
 // platforms.
-#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
+#if defined(OS_LINUX)
   return base::CurrentProcessInfo::CreationTime();
 #else
   return base::Time();
@@ -148,7 +148,6 @@ void AppListService::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterIntegerPref(prefs::kAppListEnableMethod,
                                 ENABLE_NOT_RECORDED);
   registry->RegisterInt64Pref(prefs::kAppListEnableTime, 0);
-  registry->RegisterInt64Pref(prefs::kAppListLastLaunchTime, 0);
 
 #if defined(OS_MACOSX)
   registry->RegisterIntegerPref(prefs::kAppLauncherShortcutVersion, 0);