services/shell: Allow injecting the location of resources.

services/shell/background/background_shell.cc

Index: services/shell/background/background_shell.cc
diff --git a/services/shell/background/background_shell.cc b/services/shell/background/background_shell.cc
index bbe6be85ab4f38afcb7cc5e10db4092bdd1bd7ba..ff3e3e2b56aba42393f265799ca5b3e750b708d4 100644
--- a/services/shell/background/background_shell.cc
+++ b/services/shell/background/background_shell.cc
@@ -101,6 +101,8 @@ class BackgroundShell::MojoThread : public base::SimpleThread {
       context_init_params->native_runner_delegate =
           init_params_->native_runner_delegate;
       context_init_params->init_edk = init_params_->init_edk;
+      context_init_params->override_resource_path =
+          init_params_->override_resource_path;
     }
     if (context_init_params->init_edk)
       Context::EnsureEmbedderIsInitialized();