mandoline: Fork the files service from the mojo repository.

mandoline/BUILD.gn

Index: mandoline/BUILD.gn
diff --git a/mandoline/BUILD.gn b/mandoline/BUILD.gn
index 9d91977e00b81334ee1a5642b64700b6fa9d477c..bc77478d3641210196ab87c020f671f022a620a0 100644
--- a/mandoline/BUILD.gn
+++ b/mandoline/BUILD.gn
@@ -12,6 +12,10 @@ group("all") {
 
   if (!is_component_build) {
     deps += [ "//mandoline/app" ]
+
+    if (!is_win) {
+      deps += [ "//components/filesystem" ]
+    }
   }
 }
 
@@ -32,5 +36,9 @@ group("tests") {
       "//components/view_manager:apptests",
       "//components/view_manager:tests",
     ]
+
+    if (!is_win) {
+      deps += [ "//components/filesystem:apptests" ]
+    }
   }
 }