Split //blimp/client/core to relevant parts.

blimp/client/core/blimp_navigation_controller_impl.h

-// 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.
-
-#ifndef BLIMP_CLIENT_CORE_BLIMP_NAVIGATION_CONTROLLER_IMPL_H_
-#define BLIMP_CLIENT_CORE_BLIMP_NAVIGATION_CONTROLLER_IMPL_H_
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "blimp/client/public/blimp_navigation_controller.h"
-#include "url/gurl.h"
-
-namespace blimp {
-namespace client {
-
-class BlimpContentsObserver;
-class BlimpNavigationControllerDelegate;
-
-// BlimpContentsImpl is the implementation of the core class in
-// //blimp/client/core, the BlimpContents.
-// The BlimpNavigationControllerImpl is the implementation part of
-// BlimpNavigationController. It maintains the back-forward list for a
-// BlimpContentsImpl and manages all navigation within that list.
-class BlimpNavigationControllerImpl : public BlimpNavigationController {
- public:
-  explicit BlimpNavigationControllerImpl(
-      BlimpNavigationControllerDelegate* delegate);
-  ~BlimpNavigationControllerImpl() override;
-
-  // BlimpNavigationController implementation.
-  void LoadURL(const GURL& url) override;
-  const GURL& GetURL() override;
-
- private:
-  void NotifyDelegateURLLoaded(const GURL& url);
-
-  // The delegate contains functionality required for the navigation controller
-  // to function correctly. It is also invoked on relevant state changes of the
-  // navigation controller.
-  BlimpNavigationControllerDelegate* delegate_;
-
-  // The currently active URL.
-  GURL current_url_;
-
-  // TODO(shaktisahu): Remove this after integration with NavigationFeature.
-  base::WeakPtrFactory<BlimpNavigationControllerImpl> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(BlimpNavigationControllerImpl);
-};
-
-}  // namespace client
-}  // namespace blimp
-
-#endif  // BLIMP_CLIENT_CORE_BLIMP_NAVIGATION_CONTROLLER_IMPL_H_