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

chrome/installer/launcher_support/chrome_launcher_support.h

 // 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.
 
 #ifndef CHROME_INSTALLER_LAUNCHER_SUPPORT_CHROME_LAUNCHER_SUPPORT_H_
 #define CHROME_INSTALLER_LAUNCHER_SUPPORT_CHROME_LAUNCHER_SUPPORT_H_
 
 namespace base {
 class FilePath;
+class Version;
 }
 
 namespace chrome_launcher_support {
 
 enum InstallationLevel {
   USER_LEVEL_INSTALLATION,
   SYSTEM_LEVEL_INSTALLATION,
 };
 
 enum InstallationState {
@@ skipping 41 matching lines @@
 InstallationState GetAppLauncherInstallationState();
 
 // Returns true if App Launcher is installed (system-level or user-level).
 bool IsAppLauncherPresent();
 
 // Returns true if the Chrome browser is installed (system-level or user-level).
 // If this is running in an official build, it will check if a non-canary build
 // if installed. If it is not an official build, it will always return true.
 bool IsChromeBrowserPresent();
 
+// Returns true if a given |version| of App Launcher uses legacy app_host.exe.
+bool HasLegacyAppHostExe(const base::Version& version);
+
 }  // namespace chrome_launcher_support
 
 #endif  // CHROME_INSTALLER_LAUNCHER_SUPPORT_CHROME_LAUNCHER_SUPPORT_H_