Defer the proxy service initialization to first time resolve is called....

net/http/http_network_layer.cc

Index: net/http/http_network_layer.cc
===================================================================
--- net/http/http_network_layer.cc	(revision 3703)
+++ net/http/http_network_layer.cc	(working copy)
@@ -46,18 +46,16 @@
 
 HttpNetworkLayer::HttpNetworkLayer(const ProxyInfo* pi)
     : suspended_(false) {
-  ProxyResolver* proxy_resolver;
   if (pi) {
-    proxy_resolver = new ProxyResolverFixed(*pi);
+    proxy_resolver_.reset(new ProxyResolverFixed(*pi));
   } else {
 #if defined(OS_WIN)
-    proxy_resolver = new ProxyResolverWinHttp();
+    proxy_resolver_.reset(new ProxyResolverWinHttp());
 #else
     NOTIMPLEMENTED();
-    proxy_resolver = new ProxyResolverNull();
+    proxy_resolver_.reset(new ProxyResolverNull());
 #endif
   }
-  session_ = new HttpNetworkSession(proxy_resolver);
 }
 
 HttpNetworkLayer::~HttpNetworkLayer() {
@@ -67,6 +65,9 @@
   if (suspended_)
     return NULL;
 
+  if (!session_)
+    session_ = new HttpNetworkSession(proxy_resolver_.release());
+
   return new HttpNetworkTransaction(
       session_, ClientSocketFactory::GetDefaultFactory());
 }
@@ -82,7 +83,7 @@
 void HttpNetworkLayer::Suspend(bool suspend) {
   suspended_ = suspend;
 
-  if (suspend)
+  if (suspend && session_)
     session_->connection_pool()->CloseIdleSockets();
 }