Give SxS distribution its own registration GUIDs.

chrome/installer/util/google_chrome_distribution.h

Index: chrome/installer/util/google_chrome_distribution.h
diff --git a/chrome/installer/util/google_chrome_distribution.h b/chrome/installer/util/google_chrome_distribution.h
index a00a31e514eb4b1a11fa78f5e8d624fb833c3d82..253f417e2b7c955247ae9e1636226dedd3e985d3 100644
--- a/chrome/installer/util/google_chrome_distribution.h
+++ b/chrome/installer/util/google_chrome_distribution.h
@@ -46,6 +46,10 @@ class GoogleChromeDistribution : public BrowserDistribution {
 
   virtual string16 GetBaseAppId() OVERRIDE;
 
+  virtual string16 GetBrowserProgIdPrefix() OVERRIDE;
+
+  virtual string16 GetBrowserProgIdDesc() OVERRIDE;
+
   virtual string16 GetInstallSubDir() OVERRIDE;
 
   virtual string16 GetPublisherName() OVERRIDE;
@@ -73,9 +77,13 @@ class GoogleChromeDistribution : public BrowserDistribution {
 
   virtual string16 GetVersionKey() OVERRIDE;
 
-  virtual bool GetCommandExecuteImplClsid(
+  virtual bool GetCommandExecuteImplClsidString(
       string16* handler_class_uuid) OVERRIDE;
 
+#if defined(OS_WIN)
+  virtual bool GetCommandExecuteImplClsid(CLSID* handler_class_uuid) OVERRIDE;
+#endif
+
   virtual bool AppHostIsSupported() OVERRIDE;
 
   virtual void UpdateInstallStatus(