Implementing --app-launcher install/uninstall flow.

chrome/installer/util/util_constants.cc

Index: chrome/installer/util/util_constants.cc
diff --git a/chrome/installer/util/util_constants.cc b/chrome/installer/util/util_constants.cc
index 2968b256b8dbbecfe7ca4c88188eac76031e7ba7..bc4342ab83f691ccb6a98ce8241ba07335a07e76 100644
--- a/chrome/installer/util/util_constants.cc
+++ b/chrome/installer/util/util_constants.cc
@@ -18,6 +18,11 @@ const char kChrome[] = "chrome";
 // Install Chrome App Host.
 const char kChromeAppHost[] = "app-host";
 
+// Install Chrome App Launcher, which subsumes Chrome App Host, i.e.,
+// App Launcher install converts App Host to App Launcher, and all subsequent
+// App Host updates/uninstalls become App Launcher updates/uninstalls.
+const char kChromeAppLauncher[] = "app-launcher";
+
 // Install Chrome Frame.
 const char kChromeFrame[] = "chrome-frame";
 
@@ -222,6 +227,7 @@ const wchar_t kInstallerSuccessLaunchCmdLine[] =
 // command line.
 const char kGoogleUpdateIsMachineEnvVar[] = "GoogleUpdateIsMachine";
 
+const wchar_t kOptionAppHostIsLauncher[] = L"app-host-is-launcher";
 const wchar_t kOptionMultiInstall[] = L"multi-install";
 const wchar_t kOptionReadyMode[] = L"ready-mode";