Download and cache kiosk app extension when it is added via kiosk mamangement ui.

chromeos/chromeos_paths.cc

Index: chromeos/chromeos_paths.cc
diff --git a/chromeos/chromeos_paths.cc b/chromeos/chromeos_paths.cc
index 25174d45ddd1a3f534aa46bafad46209ed7767e6..47d32de2dac893bca98c90a500bb7d83a22102f1 100644
--- a/chromeos/chromeos_paths.cc
+++ b/chromeos/chromeos_paths.cc
@@ -39,6 +39,9 @@ const base::FilePath::CharType kDeviceLocalAccountExtensionDir[] =
 const base::FilePath::CharType kDeviceLocalAccountExternalDataDir[] =
     FILE_PATH_LITERAL("/var/cache/device_local_account_external_policy_data");
 
+const base::FilePath::CharType kKioskExtensionsCacheDir[] =
+    FILE_PATH_LITERAL("/var/cache/kiosk");
+
 bool PathProvider(int key, base::FilePath* result) {
   switch (key) {
     case FILE_DEFAULT_APP_ORDER:
@@ -65,6 +68,9 @@ bool PathProvider(int key, base::FilePath* result) {
     case DIR_DEVICE_LOCAL_ACCOUNT_EXTERNAL_DATA:
       *result = base::FilePath(kDeviceLocalAccountExternalDataDir);
       break;
+    case DIR_KIOSK_EXTENSIONS_CACHE:
+      *result = base::FilePath(kKioskExtensionsCacheDir);
+      break;
     default:
       return false;
   }