Purge the App Launcher code from Windows.

chrome/browser/ui/app_list/app_list_service.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.h"
 
 #include <stdint.h>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 27 matching lines @@
   if (command_line.HasSwitch(switches::kOriginalProcessStartTime)) {
     std::string start_time_string =
         command_line.GetSwitchValueASCII(switches::kOriginalProcessStartTime);
     int64_t remote_start_time;
     base::StringToInt64(start_time_string, &remote_start_time);
     return base::Time::FromInternalValue(remote_start_time);
   }
 
 // 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();
 #endif
 }
 
 StartupType GetStartupType(const base::CommandLine& command_line) {
   // The presence of kOriginalProcessStartTime implies that another process
   // has sent us its command line to handle, ie: we are already running.
   if (command_line.HasSwitch(switches::kOriginalProcessStartTime)) {
@@ skipping 94 matching lines @@
 #if defined(OS_MACOSX)
   registry->RegisterIntegerPref(prefs::kAppLauncherShortcutVersion, 0);
 #endif
 
   // Identifies whether we should show the app launcher promo or not. This
   // becomes false when the user dismisses the promo.
   registry->RegisterBooleanPref(prefs::kShowAppLauncherPromo, true);
 }
 
 // static
 bool AppListService::HandleLaunchCommandLine(

[tapted, 2016/07/20 01:15:34]

hm - I guess desktop linux will still call this. We could delete this now, or
just to delete switches::kShowAppList entirely which should remind us

[calamity, 2016/07/25 02:34:22]

Acknowledged.

     const base::CommandLine& command_line,
     Profile* launch_profile) {
   InitAll(launch_profile, launch_profile->GetPath());
   if (!command_line.HasSwitch(switches::kShowAppList))
     return false;
 
   AppListService* service = Get();
   DCHECK(service);
   RecordStartupInfo(service, command_line, launch_profile);
   service->ShowForProfile(launch_profile);
   return true;
 }