Create an in-process v8 proxy resolver using Mojo.

net/proxy/mojo_proxy_resolver_factory.h

Index: net/proxy/mojo_proxy_resolver_factory.h
diff --git a/net/proxy/mojo_proxy_resolver_factory.h b/net/proxy/mojo_proxy_resolver_factory.h
index 2387e15a3ff057e6517f5b34467511b87c1c7f87..eaf2774e800bd9ab874967eed0164642823d79f7 100644
--- a/net/proxy/mojo_proxy_resolver_factory.h
+++ b/net/proxy/mojo_proxy_resolver_factory.h
@@ -19,6 +19,9 @@ class MojoProxyResolverFactory {
   // Note: The connection request |req| may be resolved asynchronously.
   virtual void Create(mojo::InterfaceRequest<interfaces::ProxyResolver> req,
                       interfaces::HostResolverPtr host_resolver) = 0;
+
+ protected:
+  virtual ~MojoProxyResolverFactory() = default;
 };
 
 }  // namespace net