Move SessionStorageNamespace entirely into NavigationController and support StoragePartitions.

chrome/browser/ui/omnibox/omnibox_edit_model.cc

Index: chrome/browser/ui/omnibox/omnibox_edit_model.cc
diff --git a/chrome/browser/ui/omnibox/omnibox_edit_model.cc b/chrome/browser/ui/omnibox/omnibox_edit_model.cc
index 76c65820df199a447804f4773ecb533477549999..fd83c5c0d4cb39d6720d36acbd63d5f288ce3910 100644
--- a/chrome/browser/ui/omnibox/omnibox_edit_model.cc
+++ b/chrome/browser/ui/omnibox/omnibox_edit_model.cc
@@ -50,6 +50,7 @@
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/notification_service.h"
+#include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
@@ -1144,8 +1145,8 @@ void OmniboxEditModel::DoPrerender(const AutocompleteMatch& match) {
   tab->web_contents()->GetView()->GetContainerBounds(&container_bounds);
   AutocompleteActionPredictorFactory::GetForProfile(profile_)->
       StartPrerendering(match.destination_url,
-                        tab->web_contents()->GetRenderViewHost()->
-                            GetSessionStorageNamespace(),
+                        tab->web_contents()->GetController()
+                            .GetSessionStorageNamespaceMap(),
                         container_bounds.size());
 }