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 bbe4009c610a2883efab6fb41f815df2ee17a090..a8d9094740a06f5efc026deab49419fd0e9ddec4 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1197,6 +1197,9 @@ 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.