Add GetAnyChromeSxSPath.

chrome/installer/launcher_support/chrome_launcher_support.h

Index: chrome/installer/launcher_support/chrome_launcher_support.h
diff --git a/chrome/installer/launcher_support/chrome_launcher_support.h b/chrome/installer/launcher_support/chrome_launcher_support.h
index e9f62809aebf6b06c6b9e3ee1d1be664901ec5fe..3d6de2bf5e6032f19488dd373885c94f6724da9a 100644
--- a/chrome/installer/launcher_support/chrome_launcher_support.h
+++ b/chrome/installer/launcher_support/chrome_launcher_support.h
@@ -36,6 +36,10 @@ base::FilePath GetChromePathForInstallationLevel(InstallationLevel level);
 // it can be found via Omaha client state.
 base::FilePath GetAppHostPathForInstallationLevel(InstallationLevel level);
 
+// Returns the path to an installed SxS chrome.exe at the specified level, if
+// 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.
@@ -48,6 +52,12 @@ base::FilePath GetAnyChromePath();
 // The file path returned (if any) is guaranteed to exist.
 base::FilePath GetAnyAppHostPath();
 
+// Returns the path to an installed SxS chrome.exe, or an empty path. Prefers a

[grt (UTC plus 2), 2014/03/18 13:51:06]

currently, sxs is only installed at user level, so i suggest you switch this to
check user level before system level. may as well leave the probe into
system-level in place in case we support that in the future.

[jackhou1, 2014/03/18 23:39:10]

Done.

+// system-level installation to a user-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();
+
 // Uninstalls the legacy app launcher by launching setup.exe with the uninstall
 // arguments from the App Launcher ClientState registry key. The uninstall will
 // run asynchronously.