Ensuring Google Update at user-level is installed alongside App Host, for the quick-enable App Host…

chrome/installer/util/google_update_util.h

Index: chrome/installer/util/google_update_util.h
diff --git a/chrome/installer/util/google_update_util.h b/chrome/installer/util/google_update_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..f121aaf28cf108d22bad4bc83ef7bf2320f802ef
--- /dev/null
+++ b/chrome/installer/util/google_update_util.h
@@ -0,0 +1,24 @@
+// 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_UTIL_GOOGLE_UPDATE_UTIL_H_
+#define CHROME_INSTALLER_UTIL_GOOGLE_UPDATE_UTIL_H_
+
+namespace google_update {
+
+// If user-level Google Update is absent, calls the system-level
+// GoogleUpdateSetup.exe to install it, and waits until it finishes.
+// Returns true if already installed or installed successfully.
+// Returns false if the installation fails.
+bool EnsureUserLevelGoogleUpdatePresent();

[brettw, 2012/09/26 18:17:32]

I'm not very familiar with the installer code. Is it worth noting that theses
are slow blocking operations? Or do we assume that all the installer ops are
slow blocking I/O not bother calling it out? Feel free to use your judgement
here.

[erikwright (departed), 2012/09/26 18:35:29]

The installer is single-threaded and there are many potentially blocking
operations. In these cases, the comments do state that one function "waits until
[GoogleUpdateSetup.exe] finishes" and the other mentions a timeout.

+
+// Tell Google Update that an uninstall has taken place.  This gives it a chance
+// to uninstall itself straight away if no more products are installed on the
+// system rather than waiting for the next time the scheduled task runs.
+// Returns false if Google Update could not be executed, or times out.
+bool UninstallGoogleUpdate(bool system_install);
+
+}  // namespace google_update
+
+#endif  // CHROME_INSTALLER_UTIL_GOOGLE_UPDATE_UTIL_H_