Change the NaCl loader and broker processes to use the ServiceManager.

chromecast/browser/cast_content_browser_client.cc

Index: chromecast/browser/cast_content_browser_client.cc
diff --git a/chromecast/browser/cast_content_browser_client.cc b/chromecast/browser/cast_content_browser_client.cc
index 7d9e4a3379d3e55d2b7943d3151788d7117efd92..8a80ee927260561bd16641db5ce8592ea4ed8b7a 100644
--- a/chromecast/browser/cast_content_browser_client.cc
+++ b/chromecast/browser/cast_content_browser_client.cc
@@ -434,7 +434,7 @@ void CastContentBrowserClient::RegisterInProcessServices(
 
 std::unique_ptr<base::Value>
 CastContentBrowserClient::GetServiceManifestOverlay(
-    const std::string& service_name) {
+    base::StringPiece service_name) {
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   if (service_name != content::mojom::kBrowserServiceName)
     return nullptr;