Use a utility process for the Mojo v8 proxy resolver.

net/proxy/proxy_service.h

Index: net/proxy/proxy_service.h
diff --git a/net/proxy/proxy_service.h b/net/proxy/proxy_service.h
index c4e0fea72b034e3d0c25c12fe01bec8bd00e13c6..10429c75ed838fc1f15f3f97b3cd6f6a9fde076e 100644
--- a/net/proxy/proxy_service.h
+++ b/net/proxy/proxy_service.h
@@ -354,6 +354,9 @@ class NET_EXPORT ProxyService : public NetworkChangeNotifier::IPAddressObserver,
   // Removes |req| from the list of pending requests.
   void RemovePendingRequest(PacRequest* req);
 
+  // Returns the number of pending requests.
+  size_t NumPendingRequests();

[Lei Zhang, 2015/03/03 07:50:02]

const method?

[Anand Mistry (off Chromium), 2015/03/05 05:11:02]

Done.

+
   // Called when proxy resolution has completed (either synchronously or
   // asynchronously). Handles logging the result, and cleaning out
   // bad entries from the results list.