Convert WebSecurityOrigin -> GURL without re-parsing the url

content/renderer/dom_storage/local_storage_namespace.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/dom_storage/local_storage_namespace.h"
 
 #include "content/renderer/dom_storage/local_storage_area.h"
 #include "content/renderer/dom_storage/local_storage_cached_areas.h"
 #include "third_party/WebKit/public/platform/URLConversion.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
 using blink::WebStorageArea;
 using blink::WebStorageNamespace;
-using blink::WebString;
 
 namespace content {
 
 LocalStorageNamespace::LocalStorageNamespace(
     LocalStorageCachedAreas* local_storage_cached_areas)
     : local_storage_cached_areas_(local_storage_cached_areas) {
 }
 
 LocalStorageNamespace::~LocalStorageNamespace() {
 }
 
 WebStorageArea* LocalStorageNamespace::createStorageArea(
-    const WebString& origin) {
-  return new LocalStorageArea(local_storage_cached_areas_->GetCachedArea(
-      url::Origin(blink::WebStringToGURL(origin))));
+    const blink::WebSecurityOrigin& origin) {
+  return new LocalStorageArea(
+      local_storage_cached_areas_->GetCachedArea(origin));
 }
 
 bool LocalStorageNamespace::isSameNamespace(
     const WebStorageNamespace& other) const {
   NOTREACHED() << "This method should only be called for session storage.";
   return false;
 }
 
 }  // namespace content