Use mojo app list interfaces for mash and classic ash.

ui/app_list/presenter/test/test_app_list_presenter.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 UI_APP_LIST_PRESENTER_TEST_TEST_APP_LIST_PRESENTER_H_
+#define UI_APP_LIST_PRESENTER_TEST_TEST_APP_LIST_PRESENTER_H_
+
+#include "base/macros.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "ui/app_list/presenter/app_list_presenter.mojom.h"
+
+namespace app_list {
+
+// A test implementation of AppListPresenter that records function call counts.
+// Registers itself as the presenter for the app list on construction.
+class TestAppListPresenter : public app_list::mojom::AppListPresenter {

[mfomitchev, 2016/12/22 03:17:45]

This and other test classes should probably be in test namespace (like
AppListPresenterImplTestApi). At the very least, we should be consistent.

[msw, 2016/12/22 16:31:52]

Done.

+ public:
+  TestAppListPresenter();
+  ~TestAppListPresenter() override;
+
+  app_list::mojom::AppListPresenterPtr CreateInterfacePtrAndBind();
+
+  // app_list::mojom::AppListPresenter:
+  void Show(int64_t display_id) override;
+  void Dismiss() override;
+  void ToggleAppList(int64_t display_id) override;
+
+  size_t show_count() const { return show_count_; }
+  size_t dismiss_count() const { return dismiss_count_; }
+  size_t toggle_count() const { return toggle_count_; }
+
+ private:
+  size_t show_count_ = 0u;
+  size_t dismiss_count_ = 0u;
+  size_t toggle_count_ = 0u;
+
+  mojo::Binding<app_list::mojom::AppListPresenter> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestAppListPresenter);
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_PRESENTER_TEST_TEST_APP_LIST_PRESENTER_H_