Remove navigation_service_unittests, along with the service itself.

mash/browser/browser.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 MASH_BROWSER_BROWSER_H_
-#define MASH_BROWSER_BROWSER_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "mash/public/interfaces/launchable.mojom.h"
-#include "mojo/public/cpp/bindings/binding_set.h"
-#include "services/service_manager/public/cpp/binder_registry.h"
-#include "services/service_manager/public/cpp/service.h"
-
-namespace navigation {
-class View;
-}
-
-namespace views {
-class AuraInit;
-class Widget;
-}
-
-namespace mash {
-namespace browser {
-
-class Browser : public service_manager::Service, public mojom::Launchable {
- public:
-  Browser();
-  ~Browser() override;
-
-  // Start/stop tracking individual browser windows. When we no longer track any
-  // browser windows, the application terminates. The Browser object does not
-  // own these widgets.
-  void AddWindow(views::Widget* window);
-  void RemoveWindow(views::Widget* window);
-
-  std::unique_ptr<navigation::View> CreateView();
-
- private:
-  // service_manager::Service:
-  void OnStart() override;
-  void OnBindInterface(const service_manager::BindSourceInfo& source_info,
-                       const std::string& interface_name,
-                       mojo::ScopedMessagePipeHandle interface_pipe) override;
-
-  // mojom::Launchable:
-  void Launch(uint32_t what, mojom::LaunchMode how) override;
-
-  void Create(const service_manager::BindSourceInfo& source_info,
-              mojom::LaunchableRequest request);
-
-  mojo::BindingSet<mojom::Launchable> bindings_;
-  std::vector<views::Widget*> windows_;
-
-  service_manager::BinderRegistry registry_;
-
-  std::unique_ptr<views::AuraInit> aura_init_;
-
-  DISALLOW_COPY_AND_ASSIGN(Browser);
-};
-
-}  // namespace browser
-}  // namespace mash
-
-#endif  // MASH_BROWSER_BROWSER_H_