Test extension reloading behavior.

content/browser/site_instance_impl.cc

Index: content/browser/site_instance_impl.cc
diff --git a/content/browser/site_instance_impl.cc b/content/browser/site_instance_impl.cc
index 3a93f25c9fa5de8db5c3b77772fed47daedd22bd..9911fbce4e49a31cb3a0e8105c6dc4eb22692f70 100644
--- a/content/browser/site_instance_impl.cc
+++ b/content/browser/site_instance_impl.cc
@@ -191,7 +191,10 @@ bool SiteInstanceImpl::HasRelatedSiteInstance(const GURL& url) {
 }
 
 SiteInstance* SiteInstanceImpl::GetRelatedSiteInstance(const GURL& url) {
-  return browsing_instance_->GetSiteInstanceForURL(url);
+  SiteInstance* result = browsing_instance_->GetSiteInstanceForURL(url);
+  if (render_process_host_factory_)
+    result->SetRenderProcessHostFactory(render_process_host_factory_);
+  return result;
 }
 
 bool SiteInstanceImpl::IsRelatedSiteInstance(const SiteInstance* instance) {
@@ -224,6 +227,11 @@ BrowserContext* SiteInstanceImpl::GetBrowserContext() const {
   return browsing_instance_->browser_context();
 }
 
+void SiteInstanceImpl::SetRenderProcessHostFactory(
+    const RenderProcessHostFactory* rph_factory) {
+  render_process_host_factory_ = rph_factory;
+}
+
 /*static*/
 SiteInstance* SiteInstance::Create(BrowserContext* browser_context) {
   return new SiteInstanceImpl(new BrowsingInstance(browser_context));