Give SxS distribution its own registration GUIDs.

chrome/installer/util/helper.cc

Index: chrome/installer/util/helper.cc
diff --git a/chrome/installer/util/helper.cc b/chrome/installer/util/helper.cc
index bb0f22e0749f5b4b6772a1849f8c5f7babe7f2f1..1582fce8d7cc8a02eceff92e0a86178952915cfc 100644
--- a/chrome/installer/util/helper.cc
+++ b/chrome/installer/util/helper.cc
@@ -45,7 +45,7 @@ base::FilePath GetChromeInstallPath(bool system_install,
 
 void GetChromeUserDataPaths(BrowserDistribution* dist,

[gab, 2013/09/06 18:40:08]

I doubt we even need this method anymore... the Metro user-data-dir is a thing
of the past; we never even shipped it to stable AFAIK...?

cpu?

[grt (UTC plus 2), 2013/09/09 18:39:15]

Yes, this is history. I think it can be removed (in a separate CL).

                             std::vector<base::FilePath>* paths) {
-  const bool has_metro_data = dist->CanSetAsDefault() &&
+  const bool has_metro_data = dist->IsSetAsDefaultSupported() &&
       base::win::GetVersion() >= base::win::VERSION_WIN8;
   base::FilePath data_dir(GetChromeInstallBasePath(false, dist,
                                                    kInstallUserDataDir));