Implementing unified Chrome / App Launcher flow, and migrating old stand-alone App Launcher.

chrome/installer/launcher_support/chrome_launcher_support.cc

 // Copyright (c) 2012 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/installer/launcher_support/chrome_launcher_support.h"
 
 #include <windows.h>
 #include <tchar.h>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/string16.h"
+#include "base/version.h"
 #include "base/win/registry.h"
 
 #ifndef OFFICIAL_BUILD
 #include "base/path_service.h"
 #endif
 
 namespace chrome_launcher_support {
 
 namespace {
 
@@ skipping 183 matching lines @@
 
 bool IsAppLauncherPresent() {
   return GetAppLauncherInstallationState() != NOT_INSTALLED;
 }
 
 bool IsChromeBrowserPresent() {
   return IsProductInstalled(USER_LEVEL_INSTALLATION, kBrowserAppGuid) ||
       IsProductInstalled(SYSTEM_LEVEL_INSTALLATION, kBrowserAppGuid);
 }
 
+bool HasLegacyAppHostExe(const base::Version& version) {
+  return version.IsOlderThan("28.0.1488.0");
+}
+
 }  // namespace chrome_launcher_support