Ensure extensions and the Chrome Web Store are loaded in new BrowsingInstances.

content/browser/web_contents/render_view_host_manager.cc

Index: content/browser/web_contents/render_view_host_manager.cc
diff --git a/content/browser/web_contents/render_view_host_manager.cc b/content/browser/web_contents/render_view_host_manager.cc
index 2abf1ff716fb7fd0ff8ca462cb985c8b9558b4ce..4971206f292c4f3123c8fd4a8951c7c25dc2c457 100644
--- a/content/browser/web_contents/render_view_host_manager.cc
+++ b/content/browser/web_contents/render_view_host_manager.cc
@@ -431,7 +431,9 @@ bool RenderViewHostManager::ShouldSwapProcessesForNavigation(
   }
 
   if (GetContentClient()->browser()->ShouldSwapProcessesForNavigation(
-          curr_entry ? curr_entry->GetURL() : GURL(), new_entry->GetURL())) {
+          render_view_host_->GetSiteInstance(),
+          curr_entry ? curr_entry->GetURL() : GURL(),
+          new_entry->GetURL())) {
     return true;
   }