Revert of Making answer card to behave like other results.

ui/app_list/views/search_result_answer_card_view.h

-// Copyright 2017 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_VIEWS_SEARCH_RESULT_ANSWER_CARD_VIEW_H_
-#define UI_APP_LIST_VIEWS_SEARCH_RESULT_ANSWER_CARD_VIEW_H_
-
-#include "ui/app_list/app_list_model_observer.h"
-#include "ui/app_list/views/search_result_container_view.h"
-
-namespace app_list {
-
-class AppListModel;
-class SearchResultPageView;
-
-namespace {
-class SearchAnswerContainerView;
-}
-
-// Result container for the search answer card.
-class APP_LIST_EXPORT SearchResultAnswerCardView
-    : public SearchResultContainerView,
-      public AppListModelObserver {
- public:
-  SearchResultAnswerCardView(AppListModel* model,
-                             SearchResultPageView* search_results_page_view,
-                             views::View* search_answer_view);
-  ~SearchResultAnswerCardView() override;
-
- private:
-  // Overridden from views::View:
-  const char* GetClassName() const override;
-
-  // Overridden from SearchResultContainerView:
-  void OnContainerSelected(bool from_bottom,
-                           bool directional_movement) override;
-  void NotifyFirstResultYIndex(int y_index) override {}
-  int GetYSize() override;
-  int DoUpdate() override;
-  void UpdateSelectedIndex(int old_selected, int new_selected) override;
-
-  // Overridden from AppListModelObserver
-  void OnSearchAnswerAvailableChanged(bool has_answer) override;
-
-  // Unowned pointer to application list model.
-  AppListModel* const model_;
-
-  // Pointer to the container of the search answer; owned by the view hierarchy.
-  // It's visible iff we have a search answer result.
-  SearchAnswerContainerView* const search_answer_container_view_;
-
-  DISALLOW_COPY_AND_ASSIGN(SearchResultAnswerCardView);
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_VIEWS_SEARCH_RESULT_ANSWER_CARD_VIEW_H_