Enable side-by-side beta and dev channels.

chrome/test/mini_installer/test_installer.py

Index: chrome/test/mini_installer/test_installer.py
diff --git a/chrome/test/mini_installer/test_installer.py b/chrome/test/mini_installer/test_installer.py
index c0c9a91e3b7314954d49ff6a0fb09ffef640403e..21f10a9f2e4917e9020dd2839cb8c1cc9e2d340a 100644
--- a/chrome/test/mini_installer/test_installer.py
+++ b/chrome/test/mini_installer/test_installer.py
@@ -207,9 +207,17 @@ def RunCleanCommand(force_clean, variable_expander):
     (True, '$CHROME_LONG_NAME', '--system-level',
      '$CHROME_UPDATE_REGISTRY_SUBKEY'),
   ]
-  if variable_expander.Expand('$SUPPORTS_SXS') == 'True':
-    data.append((False, '$CHROME_LONG_NAME_SXS', '',
-                 '$CHROME_UPDATE_REGISTRY_SUBKEY_SXS'))
+  if variable_expander.Expand('$BRAND') == 'Google Chrome':
+    data.extend([(False, '$CHROME_LONG_NAME_BETA', '',
+                  '$CHROME_UPDATE_REGISTRY_SUBKEY_BETA'),
+                 (True, '$CHROME_LONG_NAME_BETA', '--system-level',
+                  '$CHROME_UPDATE_REGISTRY_SUBKEY_BETA'),
+                 (False, '$CHROME_LONG_NAME_DEV', '',
+                  '$CHROME_UPDATE_REGISTRY_SUBKEY_DEV'),
+                 (True, '$CHROME_LONG_NAME_DEV', '--system-level',
+                  '$CHROME_UPDATE_REGISTRY_SUBKEY_DEV'),
+                 (False, '$CHROME_LONG_NAME_SXS', '',
+                  '$CHROME_UPDATE_REGISTRY_SUBKEY_SXS')])
 
   interactive_option = '--interactive' if not force_clean else ''
   for system_level, product_name, product_switch, registry_subkey in data: