Similar as extension, DOM UI needs to be created in its own process....

chrome/browser/tab_contents/render_view_host_manager.cc

Index: chrome/browser/tab_contents/render_view_host_manager.cc
===================================================================
--- chrome/browser/tab_contents/render_view_host_manager.cc	(revision 70598)
+++ chrome/browser/tab_contents/render_view_host_manager.cc	(working copy)
@@ -298,6 +298,11 @@
     // into the same process.
     if (new_entry->url().SchemeIs(chrome::kExtensionScheme))
       return true;
+    // When a tab is created, it starts as TYPE_NORMAL. If the new entry is a
+    // DOM UI page, it needs to run in a different process. This matches the

[Charlie Reis, 2011/01/06 18:27:59]

Nit: "it needs to be grouped with other DOM UI pages."

[klobag.chromium, 2011/01/06 20:23:02]

Done.

+    // logic when transition between DOM UI and normal pages.

[Charlie Reis, 2011/01/06 18:27:59]

Nit: transitioning

[klobag.chromium, 2011/01/06 20:23:02]

Done.

+    if (new_entry->url().SchemeIs(chrome::kChromeUIScheme))

[Charlie Reis, 2011/01/06 18:27:59]

I think we want to use DOMUIFactory::UseDOMUIForURL here, as we do below on line
319.

[klobag.chromium, 2011/01/06 20:23:02]

Done.

+      return true;
     return false;
   }