Reversed WebState <-> CRWWebController ownership.

ios/web/public/web_controller_factory.mm

-// Copyright 2015 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.
-
-#import "ios/web/public/web_controller_factory.h"
-
-#include <utility>
-
-#include "ios/web/public/browser_state.h"
-#import "ios/web/web_state/ui/crw_wk_web_view_web_controller.h"
-#include "ios/web/web_state/web_state_impl.h"
-
-namespace web {
-
-CRWWebController* CreateWebController(std::unique_ptr<WebStateImpl> web_state) {
-  return
-      [[CRWWKWebViewWebController alloc] initWithWebState:std::move(web_state)];
-}
-
-CRWWebController* CreateWebController(BrowserState* browser_state) {
-  DCHECK(browser_state);
-  std::unique_ptr<web::WebStateImpl> web_state(
-      new web::WebStateImpl(browser_state));
-  web_state->GetNavigationManagerImpl().InitializeSession(nil, nil, NO, -1);
-  return CreateWebController(std::move(web_state));
-}
-
-}  // namespace web