Move SessionStorageNamespace entirely into NavigationController and support StoragePartitions.

chrome/browser/extensions/extension_host.cc

Index: chrome/browser/extensions/extension_host.cc
diff --git a/chrome/browser/extensions/extension_host.cc b/chrome/browser/extensions/extension_host.cc
index 88920d2376691a4ab68903cb407fa5f7032f27ea..3332c44510f744915b131ddaa07b2855c09a40d1 100644
--- a/chrome/browser/extensions/extension_host.cc
+++ b/chrome/browser/extensions/extension_host.cc
@@ -140,7 +140,7 @@ ExtensionHost::ExtensionHost(const Extension* extension,
       extension_host_type_(host_type),
       associated_web_contents_(NULL) {
   host_contents_.reset(WebContents::Create(
-      profile_, site_instance, MSG_ROUTING_NONE, NULL, NULL));
+      profile_, site_instance, MSG_ROUTING_NONE, NULL));
   content::WebContentsObserver::Observe(host_contents_.get());
   host_contents_->SetDelegate(this);
   chrome::SetViewType(host_contents_.get(), host_type);