Introduce NetworkDelegate's implementation in extensions.

content/shell/browser/shell_browser_context.cc

Index: content/shell/browser/shell_browser_context.cc
diff --git a/content/shell/browser/shell_browser_context.cc b/content/shell/browser/shell_browser_context.cc
index 9b0003bb5af73a4d8388024ca6f92a68c2500f90..6d0d60470e80405279de3338fbaa2b11a45090f4 100644
--- a/content/shell/browser/shell_browser_context.cc
+++ b/content/shell/browser/shell_browser_context.cc
@@ -133,11 +133,11 @@ net::URLRequestContextGetter* ShellBrowserContext::GetRequestContext()  {
   return GetDefaultStoragePartition(this)->GetURLRequestContext();
 }
 
-net::URLRequestContextGetter* ShellBrowserContext::CreateRequestContext(
+content::ShellURLRequestContextGetter*
+ShellBrowserContext::CreateURLRequestContextGetter(
     ProtocolHandlerMap* protocol_handlers,
     URLRequestInterceptorScopedVector request_interceptors) {
-  DCHECK(!url_request_getter_.get());
-  url_request_getter_ = new ShellURLRequestContextGetter(
+  return new ShellURLRequestContextGetter(
       ignore_certificate_errors_,
       GetPath(),
       BrowserThread::UnsafeGetMessageLoopForThread(BrowserThread::IO),
@@ -145,10 +145,30 @@ net::URLRequestContextGetter* ShellBrowserContext::CreateRequestContext(
       protocol_handlers,
       request_interceptors.Pass(),
       net_log_);
+}
+
+net::URLRequestContextGetter* ShellBrowserContext::CreateRequestContext(
+    ProtocolHandlerMap* protocol_handlers,
+    URLRequestInterceptorScopedVector request_interceptors) {
+  DCHECK(!url_request_getter_.get());
+  url_request_getter_ = CreateURLRequestContextGetter(
+      protocol_handlers, request_interceptors.Pass());
   resource_context_->set_url_request_context_getter(url_request_getter_.get());
   return url_request_getter_.get();
 }
 
+net::URLRequestContextGetter* ShellBrowserContext::CreateRequestContext(
+      ProtocolHandlerMap* protocol_handlers,
+      URLRequestInterceptorScopedVector request_interceptors,
+      net::NetworkDelegate* network_delegate) {
+  ShellURLRequestContextGetter* shell_request_context_getter =
+      reinterpret_cast<ShellURLRequestContextGetter*>(CreateRequestContext(
+          protocol_handlers, request_interceptors.Pass()));
+  shell_request_context_getter->set_network_delegate(network_delegate);
+  url_request_getter_ = shell_request_context_getter;
+  return url_request_getter_.get();
+}
+
 net::URLRequestContextGetter*
     ShellBrowserContext::GetRequestContextForRenderProcess(
         int renderer_child_id)  {