Move app_installer into chromium.

chrome/installer/launcher_support/chrome_launcher_support.h

 // 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_LAUNCHER_SUPPORT_CHROME_LAUNCHER_SUPPORT_H_
 #define CHROME_INSTALLER_LAUNCHER_SUPPORT_CHROME_LAUNCHER_SUPPORT_H_
 
 namespace base {
 class FilePath;
 }
 
 namespace chrome_launcher_support {
 
 enum InstallationLevel {
   USER_LEVEL_INSTALLATION,
   SYSTEM_LEVEL_INSTALLATION,
 };
 
 // Returns the path to an installed chrome.exe at the specified level, if it can
 // be found via Omaha client state. Prefers the installer from a multi-install,
 // but may also return that of a single-install of Chrome if no multi-install
 // exists.
 base::FilePath GetChromePathForInstallationLevel(InstallationLevel level);
 
+// Returns the path to an installed SxS chrome.exe at the specified level, if

[grt (UTC plus 2), 2014/07/30 15:05:37]

sorry for deleting your code. :-)

[jackhou1, 2014/07/31 03:24:56]

Acceptable collateral damage from a worthwhile cleanup. =)

+// it can be found via Omaha client state.
+base::FilePath GetChromeSxSPathForInstallationLevel(InstallationLevel level);
+
 // Returns the path to an installed chrome.exe, or an empty path. Prefers a
 // system-level installation to a user-level installation. Uses Omaha client
 // state to identify a Chrome installation location.
 // The file path returned (if any) is guaranteed to exist.
 base::FilePath GetAnyChromePath();
 
+// Returns the path to an installed SxS chrome.exe, or an empty path. Prefers a
+// user-level installation to a system-level installation. Uses Omaha client
+// state to identify a Chrome Canary installation location.
+// The file path returned (if any) is guaranteed to exist.
+base::FilePath GetAnyChromeSxSPath();
+
 }  // namespace chrome_launcher_support
 
 #endif  // CHROME_INSTALLER_LAUNCHER_SUPPORT_CHROME_LAUNCHER_SUPPORT_H_