Revert "Revert "Allow DOMUI pages to call window.open(), giving DOMUI privileges to the new""

chrome/browser/tab_contents/render_view_host_manager.cc

Index: chrome/browser/tab_contents/render_view_host_manager.cc
diff --git a/chrome/browser/tab_contents/render_view_host_manager.cc b/chrome/browser/tab_contents/render_view_host_manager.cc
index 101c1f860b8f2d47d73d4b6399efacf06cf9163a..6b3866f9ac3c260cd7333c90bb9ca43b87b9f6e1 100644
--- a/chrome/browser/tab_contents/render_view_host_manager.cc
+++ b/chrome/browser/tab_contents/render_view_host_manager.cc
@@ -187,6 +187,11 @@ void RenderViewHostManager::DidNavigateMainFrame(
   }
 }
 
+void RenderViewHostManager::SetDOMUIPostCommit(DOMUI* dom_ui) {
+  DCHECK(!dom_ui_.get());
+  dom_ui_.reset(dom_ui);
+}
+
 void RenderViewHostManager::RendererAbortedProvisionalLoad(
     RenderViewHost* render_view_host) {
   // We used to cancel the pending renderer here for cross-site downloads.