Use chromium logic for database identifier<->origin conversions

webkit/base/origin_url_conversions.cc

-// Copyright 2013 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 "webkit/base/origin_url_conversions.h"
-
-#include "base/strings/utf_string_conversions.h"
-#include "googleurl/src/gurl.h"
-#include "third_party/WebKit/public/platform/WebCString.h"
-#include "third_party/WebKit/public/platform/WebString.h"
-#include "third_party/WebKit/public/web/WebSecurityOrigin.h"
-
-namespace webkit_base {
-
-GURL GetOriginURLFromIdentifier(const std::string& identifier) {
-  WebKit::WebSecurityOrigin web_security_origin =
-      WebKit::WebSecurityOrigin::createFromDatabaseIdentifier(
-          WebKit::WebString::fromUTF8(identifier));
-
-  // We need this work-around for file:/// URIs as
-  // createFromDatabaseIdentifier returns null origin_url for them.
-  if (web_security_origin.isUnique()) {
-    if (identifier.find("file__") == 0)
-      return GURL("file:///");
-    return GURL();
-  }
-
-  return GURL(web_security_origin.toString());
-}
-
-std::string GetOriginIdentifierFromURL(const GURL& url) {
-  return WebKit::WebSecurityOrigin::createFromString(
-      UTF8ToUTF16(url.spec())).databaseIdentifier().utf8();
-}
-
-}  // namespace webkit_base