Revert 217247 "Whitelist TimeScapes to access restricted native ..."

trunk/src/chrome/browser/chromeos/fileapi/file_system_backend.cc

Index: trunk/src/chrome/browser/chromeos/fileapi/file_system_backend.cc
===================================================================
--- trunk/src/chrome/browser/chromeos/fileapi/file_system_backend.cc	(revision 217736)
+++ trunk/src/chrome/browser/chromeos/fileapi/file_system_backend.cc	(working copy)
@@ -142,13 +142,6 @@
     return false;
 
   std::string extension_id = origin_url.host();
-  // TODO(mtomasz): Temporarily whitelist TimeScapes. Remove this in M-31.
-  // See: crbug.com/271946
-  if (extension_id == "mppoamgbcpnkpacolchbacppkflagjbp" &&
-      url.mount_type() == fileapi::kFileSystemTypeRestrictedNativeLocal) {
-    return true;
-  }
-
   // Check first to make sure this extension has fileBrowserHander permissions.
   if (!special_storage_policy_->IsFileHandler(extension_id))
     return false;