mandoline filesystem: Save cookie data to the mojo:filesystem.

mojo/runner/switches.cc

Index: mojo/runner/switches.cc
diff --git a/mojo/runner/switches.cc b/mojo/runner/switches.cc
index 1ed957ec293d8c21321db76a865f09ccdc0cd32e..f4290f6bbb68be97908f02636538eaab2639cb8a 100644
--- a/mojo/runner/switches.cc
+++ b/mojo/runner/switches.cc
@@ -50,4 +50,12 @@ const char kTraceStartup[] = "trace-startup";
 // the first maps 'a' to 'b' and the second 'c' to 'd'.
 const char kURLMappings[] = "url-mappings";
 
+// When this is set, we create a temporary user data dir for the process, and
+// add a flag so kUserDataDir points to it.
+const char kUseTemporaryUserDataDir[] = "use-temporary-user-data-dir";
+
+// Specifies the user data directory. This is the one directory which stores
+// all persistent data.
+const char kUserDataDir[] = "user-data-dir";
+
 }  // namespace switches