Make the auto-launch experiment profile-aware.

chrome/installer/util/auto_launch_util.h

Index: chrome/installer/util/auto_launch_util.h
===================================================================
--- chrome/installer/util/auto_launch_util.h	(revision 119922)
+++ chrome/installer/util/auto_launch_util.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -15,16 +15,20 @@
 // Returns whether the Chrome executable specified in |application_path| is set
 // to auto-launch at computer startup. NOTE: |application_path| is optional and
 // should be blank in most cases (as it will default to the application path of
-// the current executable).
-bool WillLaunchAtLogin(const FilePath& application_path);
+// the current executable). |profile_path| is the path to the current profile.

[grt (UTC plus 2), 2012/02/01 18:45:15]

"current profile" -> "profile that should be opened at launch" or somesuch

+bool WillLaunchAtLogin(const FilePath& application_path,
+                       const FilePath& profile_path);
 
 // Configures whether the Chrome executable should auto-launch at computer
 // startup. |application_path| is needed when |auto_launch| is true AND when
 // the caller is not the process being set to auto-launch, ie. the installer.
 // This is because |application_path|, if left blank, defaults to the
 // application path of the current executable. If |auto_launch| is true, then it
-// will auto-launch, otherwise it will be configured not to.
-void SetWillLaunchAtLogin(bool auto_launch, const FilePath& application_path);
+// will auto-launch, otherwise it will be configured not to. |profile_path| is
+// the path to the current profile.

[grt (UTC plus 2), 2012/02/01 18:45:15]

same as above

+void SetWillLaunchAtLogin(bool auto_launch,
+                          const FilePath& application_path,
+                          const FilePath& profile_path);
 
 }  // namespace auto_launch_util