Shut down proxy resolver utility processes when no longer needed.

net/proxy/proxy_service_mojo.cc

Index: net/proxy/proxy_service_mojo.cc
diff --git a/net/proxy/proxy_service_mojo.cc b/net/proxy/proxy_service_mojo.cc
index b714f03efcb5a1f572a11ea3625daf5c6a2f9997..6fa2cb6e30499e1d9f35e47cfc011e57d5702f11 100644
--- a/net/proxy/proxy_service_mojo.cc
+++ b/net/proxy/proxy_service_mojo.cc
@@ -4,8 +4,9 @@
 
 #include "net/proxy/proxy_service_mojo.h"
 
+#include "base/callback_helpers.h"
 #include "base/logging.h"
-#include "net/dns/host_resolver_mojo.h"
+#include "net/dns/mojo_host_resolver_impl.h"
 #include "net/interfaces/proxy_resolver_service.mojom.h"
 #include "net/proxy/in_process_mojo_proxy_resolver_factory.h"
 #include "net/proxy/mojo_proxy_resolver_impl.h"
@@ -28,8 +29,15 @@ class ProxyResolverFactoryForMojoResolver : public ProxyResolverFactory {
 
   // ProxyResolverFactory override.
   scoped_ptr<ProxyResolver> CreateProxyResolver() override {
+    interfaces::HostResolverPtr mojo_host_resolver_ptr;
+    interfaces::ProxyResolverPtr mojo_proxy_resolver_ptr;
+    auto host_resolver_request = mojo::GetProxy(&mojo_host_resolver_ptr);
+    scoped_ptr<base::ScopedClosureRunner> runner(
+        mojo_proxy_factory_->Create(mojo::GetProxy(&mojo_proxy_resolver_ptr),
+                                    mojo_host_resolver_ptr.Pass()));
     return make_scoped_ptr(
-        new ProxyResolverMojo(mojo_proxy_factory_, host_resolver_));
+        new ProxyResolverMojo(mojo_proxy_resolver_ptr.Pass(), host_resolver_,
+                              host_resolver_request.Pass(), runner.Pass()));
   }
 
  private: