Add search results to experimental app list start page.

ui/app_list/views/start_page_view.h

 // Copyright 2014 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_START_PAGE_VIEW_H_
 #define UI_APP_LIST_VIEWS_START_PAGE_VIEW_H_
 
 #include "base/basictypes.h"
 #include "ui/app_list/app_list_model_observer.h"
 #include "ui/app_list/app_list_view_delegate_observer.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view.h"
 
 namespace app_list {
 
 class AppListMainView;
 class AppListModel;
 class AppListViewDelegate;
+class SearchResultListView;
 class TileItemView;
 
 // The start page for the experimental app list.
 class StartPageView : public views::View,
                       public views::ButtonListener,
                       public AppListViewDelegateObserver,
                       public AppListModelObserver {
  public:
   StartPageView(AppListMainView* app_list_main_view,
                 AppListViewDelegate* view_delegate);
   virtual ~StartPageView();
 
   void Reset();
+  void ShowSearchResults();
+
+  bool IsShowingSearchResults() const;
 
   const std::vector<TileItemView*>& tile_views() const { return tile_views_; }
 
+  // Overridden from views::View:
+  virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
+  virtual void Layout() OVERRIDE;
+
  private:
+  enum ShowState {
+    SHOW_SEARCH_RESULTS,
+    SHOW_START_PAGE,
+  };
+
+  void SetShowState(ShowState show_state);
   void SetModel(AppListModel* model);
 
   // Overridden from views::ButtonListener:
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
   // Overridden from AppListViewDelegateObserver:
   virtual void OnProfilesChanged() OVERRIDE;
 
   // Overridden from AppListModelObserver:
   virtual void OnAppListModelStatusChanged() OVERRIDE;
   virtual void OnAppListItemAdded(AppListItem* item) OVERRIDE;
   virtual void OnAppListItemDeleted() OVERRIDE;
   virtual void OnAppListItemUpdated(AppListItem* item) OVERRIDE;
 
   // The parent view of ContentsView which is the parent of this view.
   AppListMainView* app_list_main_view_;
 
   AppListModel* model_;  // Owned by AppListSyncableService.
 
   AppListViewDelegate* view_delegate_;  // Owned by AppListView.
 
+  SearchResultListView* results_view_;  // Owned by views hierarchy.
   views::View* instant_container_;  // Owned by views hierarchy.
   views::View* tiles_container_;    // Owned by views hierarchy.
 
   std::vector<TileItemView*> tile_views_;
 
+  ShowState show_state_;
+
   DISALLOW_COPY_AND_ASSIGN(StartPageView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_START_PAGE_VIEW_H_