Write the outcome of the Toast Experiment for system-level installs to the right registry key.

BUG=44378
TEST=None

Review URL: http://codereview.chromium.org/3308003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@58639 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 18 insertions, 1 deletions

diff --git a/chrome/installer/util/google_update_settings.h b/chrome/installer/util/google_update_settings.h
index 6e12cb66..715ef9f 100644
--- a/chrome/installer/util/google_update_settings.h
+++ b/chrome/installer/util/google_update_settings.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -105,6 +105,23 @@ class GoogleUpdateSettings {
                                               int install_return_code,
                                               const std::wstring& value);
 
+  // For system-level installs, we need to be able to communicate the results
+  // of the Toast Experiments back to Google Update. The problem is just that
+  // the experiment is run in the context of the user, which doesn't have
+  // write access to the HKLM key that Google Update expects the results in.
+  // However, when we are about to switch contexts from system to user, we can
+  // duplicate the handle to the registry key and pass it (through handle
+  // inheritance) to the newly created child process that is launched as the
+  // user, allowing the child process to write to the key, with the
+  // WriteGoogleUpdateSystemClientKey function below.
+  static int DuplicateGoogleUpdateSystemClientKey();
+
+  // Takes a |handle| to a registry key and writes |value| string into the
+  // specified |key|. See DuplicateGoogleUpdateSystemClientKey for details.
+  static bool WriteGoogleUpdateSystemClientKey(int handle,
+                                               const std::wstring& key,
+                                               const std::wstring& value);
+
   // True if a build is strictly organic, according to its brand code.
   static bool IsOrganic(const std::wstring& brand);