Remove some dead app host code.

chrome/installer/util/chrome_app_host_distribution.cc

Index: chrome/installer/util/chrome_app_host_distribution.cc
diff --git a/chrome/installer/util/chrome_app_host_distribution.cc b/chrome/installer/util/chrome_app_host_distribution.cc
index 85e50d5a3c369f6c70e17164ca3a4fb917fdf3fe..6e831e5b9d612378a784fb3e8972c22d74c29a43 100644
--- a/chrome/installer/util/chrome_app_host_distribution.cc
+++ b/chrome/installer/util/chrome_app_host_distribution.cc
@@ -21,17 +21,11 @@
 
 #include "installer_util_strings.h"  // NOLINT
 
-namespace {
-
-const wchar_t kChromeAppHostGuid[] = L"{FDA71E6F-AC4C-4a00-8B70-9958A68906BF}";
-
-}  // namespace
-
 ChromeAppHostDistribution::ChromeAppHostDistribution()
     : BrowserDistribution(
           CHROME_APP_HOST,
           scoped_ptr<AppRegistrationData>(
-              new UpdatingAppRegistrationData(kChromeAppHostGuid))) {
+              new UpdatingAppRegistrationData(installer::kAppLauncherGuid))) {
 }
 
 base::string16 ChromeAppHostDistribution::GetBaseAppName() {