Give SxS distribution its own registration GUIDs.

chrome/installer/util/google_chrome_sxs_distribution.h

Index: chrome/installer/util/google_chrome_sxs_distribution.h
diff --git a/chrome/installer/util/google_chrome_sxs_distribution.h b/chrome/installer/util/google_chrome_sxs_distribution.h
index 5261a7accdd044708b9b8d8220c51b1f7cf92b55..3e2430009f5295456252c6aa71e3c21ce51697f8 100644
--- a/chrome/installer/util/google_chrome_sxs_distribution.h
+++ b/chrome/installer/util/google_chrome_sxs_distribution.h
@@ -23,11 +23,14 @@ class GoogleChromeSxSDistribution : public GoogleChromeDistribution {
   virtual string16 GetShortcutName(ShortcutType shortcut_type) OVERRIDE;
   virtual int GetIconIndex(ShortcutType shortcut_type) OVERRIDE;
   virtual string16 GetBaseAppId() OVERRIDE;
+  virtual string16 GetBrowserProgIdPrefix() OVERRIDE;
+  virtual string16 GetBrowserProgIdDesc() OVERRIDE;
   virtual string16 GetInstallSubDir() OVERRIDE;
   virtual string16 GetUninstallRegPath() OVERRIDE;
   virtual bool CanSetAsDefault() OVERRIDE;
+  virtual void DebugEnableSetAsDefault() OVERRIDE;
   virtual bool GetChromeChannel(string16* channel) OVERRIDE;
-  virtual bool GetCommandExecuteImplClsid(
+  virtual bool GetCommandExecuteImplClsidString(
       string16* handler_class_uuid) OVERRIDE;
   virtual bool AppHostIsSupported() OVERRIDE;
   virtual bool ShouldSetExperimentLabels() OVERRIDE;
@@ -39,6 +42,8 @@ class GoogleChromeSxSDistribution : public GoogleChromeDistribution {
 
   // Disallow construction from non-friends.
   GoogleChromeSxSDistribution();
+
+  bool enable_set_as_default_;
 };
 
 #endif  // CHROME_INSTALLER_UTIL_GOOGLE_CHROME_SXS_DISTRIBUTION_H_