Give SxS distribution its own registration GUIDs.

chrome/installer/util/chrome_frame_distribution.cc

Index: chrome/installer/util/chrome_frame_distribution.cc
diff --git a/chrome/installer/util/chrome_frame_distribution.cc b/chrome/installer/util/chrome_frame_distribution.cc
index f968178886a1db002cd95f9be4d4371f5013a276..ae273ef10399e722a9151f9be8e27f73ac6fe06b 100644
--- a/chrome/installer/util/chrome_frame_distribution.cc
+++ b/chrome/installer/util/chrome_frame_distribution.cc
@@ -121,6 +121,10 @@ int ChromeFrameDistribution::GetIconIndex(ShortcutType shortcut_type) {
   }
 }
 
+bool ChromeFrameDistribution::IsSetAsDefaultSupported() {
+  return false;
+}
+
 bool ChromeFrameDistribution::CanSetAsDefault() {
   return false;
 }
@@ -129,11 +133,16 @@ bool ChromeFrameDistribution::CanCreateDesktopShortcuts() {
   return false;
 }
 
-bool ChromeFrameDistribution::GetCommandExecuteImplClsid(
+bool ChromeFrameDistribution::GetCommandExecuteImplClsidString(
     string16* handler_class_uuid) {
   return false;

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

I find it sad to have to duplicate this logic from GetCommandExecuteImplClsid()
everywhere... I remember we talked about this and determined this was probably
the easiest way; but what was the reason again for not being able to only store
the GUID as a constant and have this method return the string conversion of each
distribution's GetCommandExecuteImplClsid()?

[zturner, 2013/09/06 20:53:16]

StringFromCLSID() and UuidToString() both internally allocate memory for the
string, which the caller is required to free.  (CoTaskMemFree and RpcStringFree,
respectively).  We could still provide the helper and to the memory freeing
there, but it just seemed ugly.  We decided not to do the reverse (store the
string and convert to GUID) because the opposite function, UuidFromString, isn't
const correct and would require both a const_cast<> and a reinterpret_cast<> in
order to call the function.  So that was also ugly.

However, Greg pointed out CLSIDFromString(), which is const-correct, so that's
probably the best solution.

At some point, someone (I wouldn't mind doing it) should build out base::guid so
that it's more useful and does all this for us. 

 }
 
+bool ChromeFrameDistribution::GetCommandExecuteImplClsid(
+    CLSID* handler_class_uuid) {
+  return false;
+}
+
 void ChromeFrameDistribution::UpdateInstallStatus(bool system_install,
     installer::ArchiveType archive_type,
     installer::InstallStatus install_status) {