Move SessionStorageNamespace entirely into NavigationController and support StoragePartitions.

chrome/browser/ui/panels/panel_host.cc

Index: chrome/browser/ui/panels/panel_host.cc
diff --git a/chrome/browser/ui/panels/panel_host.cc b/chrome/browser/ui/panels/panel_host.cc
index 9162967105b747a85534a3077b9a3292764428f3..9c0570167761f0348218eb47125219c5ca8c83b9 100644
--- a/chrome/browser/ui/panels/panel_host.cc
+++ b/chrome/browser/ui/panels/panel_host.cc
@@ -45,7 +45,7 @@ void PanelHost::Init(const GURL& url) {
 
   web_contents_.reset(content::WebContents::Create(
       profile_, content::SiteInstance::CreateForURL(profile_, url),
-      MSG_ROUTING_NONE, NULL, NULL));
+      MSG_ROUTING_NONE, NULL));
   chrome::SetViewType(web_contents_.get(), chrome::VIEW_TYPE_PANEL);
   web_contents_->SetDelegate(this);
   content::WebContentsObserver::Observe(web_contents_.get());