services/shell: Allow injecting the location of resources.

services/catalog/catalog.cc

Index: services/catalog/catalog.cc
diff --git a/services/catalog/catalog.cc b/services/catalog/catalog.cc
index 19b088373551c99d2c1e8b8e4fe61aab08804696..6f513bf855f7058cbe847bb32aabbac497b0dbb5 100644
--- a/services/catalog/catalog.cc
+++ b/services/catalog/catalog.cc
@@ -129,8 +129,9 @@ void Catalog::Create(const shell::Identity& remote_identity,
                      filesystem::mojom::DirectoryRequest request) {
   if (!lock_table_)
     lock_table_ = new filesystem::LockTable;
-  base::FilePath resources_path =
-      GetPathForApplicationName(remote_identity.name());
+  base::FilePath resources_path(override_resource_path_);
+  if (resources_path.empty())
+    resources_path = GetPathForApplicationName(remote_identity.name());
   mojo::MakeStrongBinding(
       base::MakeUnique<filesystem::DirectoryImpl>(
           resources_path, scoped_refptr<filesystem::SharedTempDir>(),