services/shell: Allow injecting the location of resources.

services/shell/standalone/context.h

Index: services/shell/standalone/context.h
diff --git a/services/shell/standalone/context.h b/services/shell/standalone/context.h
index 4105956bf7400c6b3ed9452f367427a6c03226a0..dd409d3f0eb541535c9a5e3afb1a35e64d9d1c82 100644
--- a/services/shell/standalone/context.h
+++ b/services/shell/standalone/context.h
@@ -8,6 +8,7 @@
 #include <memory>
 
 #include "base/callback_forward.h"
+#include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread.h"
@@ -37,6 +38,7 @@ class Context : public mojo::edk::ProcessDelegate {
 
     NativeRunnerDelegate* native_runner_delegate = nullptr;
     std::unique_ptr<catalog::Store> catalog_store;
+    base::FilePath::StringType override_resource_path;
     // If true the edk is initialized.
     bool init_edk = true;
   };