Add a test for installing Chrome at system level.

chrome/test/mini_installer/config/chrome_system_installed.prop

Index: chrome/test/mini_installer/config/chrome_system_installed.prop
diff --git a/chrome/test/mini_installer/config/chrome_installed.prop b/chrome/test/mini_installer/config/chrome_system_installed.prop
similarity index 53%
copy from chrome/test/mini_installer/config/chrome_installed.prop
copy to chrome/test/mini_installer/config/chrome_system_installed.prop
index 6fe8aca009f61aa0e85f9dda070786507be38097..c1aa3337e437ca0a8491aec1bf720b27cc22e211 100644
--- a/chrome/test/mini_installer/config/chrome_installed.prop
+++ b/chrome/test/mini_installer/config/chrome_system_installed.prop
@@ -1,15 +1,15 @@
 {
   "Files": {
-    "$LOCAL_APPDATA\\$CHROME_DIR\\Application\\chrome.exe": {"exists": true},
-    "$LOCAL_APPDATA\\$CHROME_DIR\\Application\\$MINI_INSTALLER_FILE_VERSION\\chrome.dll":
+    "$PROGRAM_FILES\\$CHROME_DIR\\Application\\chrome.exe": {"exists": true},
+    "$PROGRAM_FILES\\$CHROME_DIR\\Application\\$MINI_INSTALLER_FILE_VERSION\\chrome.dll":
         {"exists": true},
-    "$LOCAL_APPDATA\\$CHROME_DIR\\Application\\$MINI_INSTALLER_FILE_VERSION\\Installer\\chrome.7z":
+    "$PROGRAM_FILES\\$CHROME_DIR\\Application\\$MINI_INSTALLER_FILE_VERSION\\Installer\\chrome.7z":
         {"exists": true},
-    "$LOCAL_APPDATA\\$CHROME_DIR\\Application\\$MINI_INSTALLER_FILE_VERSION\\Installer\\setup.exe":
+    "$PROGRAM_FILES\\$CHROME_DIR\\Application\\$MINI_INSTALLER_FILE_VERSION\\Installer\\setup.exe":
         {"exists": true}
   },
   "RegistryEntries": {
-    "HKEY_CURRENT_USER\\$CHROME_UPDATE_REGISTRY_SUBKEY": {
+    "HKEY_LOCAL_MACHINE\\$CHROME_UPDATE_REGISTRY_SUBKEY": {
       "exists": true,
       "values": {
         "pv": {"type": "SZ", "data": "$MINI_INSTALLER_FILE_VERSION"}