Use a utility process for the Mojo v8 proxy resolver.

chrome/utility/chrome_content_utility_client.cc

Index: chrome/utility/chrome_content_utility_client.cc
diff --git a/chrome/utility/chrome_content_utility_client.cc b/chrome/utility/chrome_content_utility_client.cc
index 843b1f37ea88030b14df9df1bb7689375d07486c..27b7ca2ed4198864a5d46bfbde91f9216906b11d 100644
--- a/chrome/utility/chrome_content_utility_client.cc
+++ b/chrome/utility/chrome_content_utility_client.cc
@@ -15,10 +15,12 @@
 #include "chrome/utility/utility_message_handler.h"
 #include "content/public/child/image_decoder_utils.h"
 #include "content/public/common/content_switches.h"
+#include "content/public/common/service_registry.h"
 #include "content/public/utility/utility_thread.h"
 #include "courgette/courgette.h"
 #include "courgette/third_party/bsdiff.h"
 #include "ipc/ipc_channel.h"
+#include "net/proxy/mojo_proxy_resolver_factory_impl.h"
 #include "skia/ext/image_operations.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/zlib/google/zip.h"
@@ -160,6 +162,21 @@ bool ChromeContentUtilityClient::OnMessageReceived(
   return handled;
 }
 
+namespace {
+
+void CreateProxyResolverFactory(
+    mojo::InterfaceRequest<net::interfaces::ProxyResolverFactory> request) {
+  new net::MojoProxyResolverFactoryImpl(request.Pass());

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

Can you add a comment re: MojoProxyResolverFactoryImpl lifetime?

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

Done.

+}
+
+}  // namespace
+
+void ChromeContentUtilityClient::RegisterMojoServices(
+    content::ServiceRegistry* registry) {
+  registry->AddService<net::interfaces::ProxyResolverFactory>(
+      base::Bind(CreateProxyResolverFactory));
+}
+
 // static
 void ChromeContentUtilityClient::PreSandboxStartup() {
 #if defined(ENABLE_EXTENSIONS)