Move SessionStorageNamespace entirely into NavigationController and support StoragePartitions.

chrome/browser/ui/browser_tab_strip_model_delegate.cc

Index: chrome/browser/ui/browser_tab_strip_model_delegate.cc
diff --git a/chrome/browser/ui/browser_tab_strip_model_delegate.cc b/chrome/browser/ui/browser_tab_strip_model_delegate.cc
index d543b4f6799f7227f17f6d13503117c23cea4adf..7dc62ca014bfa39e7f4ac40d39266314f346a142 100644
--- a/chrome/browser/ui/browser_tab_strip_model_delegate.cc
+++ b/chrome/browser/ui/browser_tab_strip_model_delegate.cc
@@ -85,7 +85,7 @@ TabContents* BrowserTabStripModelDelegate::CreateTabContentsForURL(
     content::PageTransition transition, bool defer_load,
     content::SiteInstance* instance) const {
   TabContents* contents = TabContentsFactory(profile, instance,
-      MSG_ROUTING_NONE, GetActiveWebContents(browser_), NULL);
+      MSG_ROUTING_NONE, GetActiveWebContents(browser_));
   if (!defer_load) {
     // Load the initial URL before adding the new tab contents to the tab strip
     // so that the tab contents has navigation state.