Use a utility process for the Mojo v8 proxy resolver.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 2383d1eb89e86c67d689942c91023a4beb98fcd5..28188edbe9fb915ad1125a6b8bbc2f1c66d90553 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1175,6 +1175,9 @@ const char kUseSimpleCacheBackend[]         = "use-simple-cache-backend";
 // Enables using an in-process Mojo service for the v8 proxy resolver.
 const char kV8PacMojoInProcess[] = "v8-pac-mojo-in-process";
 
+// Enables using an out-of-process Mojo service for the v8 proxy resolver.
+const char kV8PacMojoOutOfProcess[] = "v8-pac-mojo-out-of-process";
+
 // Specifies a custom URL for the server which reports variation data to the
 // client. Specifying this switch enables the Variations service on
 // unofficial builds. See variations_service.cc.