Revert 285661 "Remove some dead app host code."

trunk/src/chrome/installer/setup/setup_main.cc

Index: trunk/src/chrome/installer/setup/setup_main.cc
===================================================================
--- trunk/src/chrome/installer/setup/setup_main.cc	(revision 285705)
+++ trunk/src/chrome/installer/setup/setup_main.cc	(working copy)
@@ -1639,6 +1639,16 @@
           RemoveChromeLegacyRegistryKeys(chrome->distribution(), chrome_exe);
         }
       }
+
+      if (prefs.install_chrome_app_launcher() &&
+          InstallUtil::GetInstallReturnCode(install_status) == 0) {
+        std::string webstore_item(google_update::GetUntrustedDataValue(
+            kInstallFromWebstore));
+        if (!webstore_item.empty()) {
+          bool success = InstallFromWebstore(webstore_item);
+          VLOG_IF(1, !success) << "Failed to launch app installation.";
+        }
+      }
     }
   }