Add search results to experimental app list start page.

ui/app_list/views/start_page_view.h

Index: ui/app_list/views/start_page_view.h
diff --git a/ui/app_list/views/start_page_view.h b/ui/app_list/views/start_page_view.h
index 154520936cdbc27122a54a212de2dfb79f659db0..73aac60a804c1d538f75172d74c5cf44e696e9bd 100644
--- a/ui/app_list/views/start_page_view.h
+++ b/ui/app_list/views/start_page_view.h
@@ -16,6 +16,7 @@ namespace app_list {
 class AppListMainView;
 class AppListModel;
 class AppListViewDelegate;
+class SearchResultListView;
 class TileItemView;
 
 // The start page for the experimental app list.
@@ -29,10 +30,23 @@ class StartPageView : public views::View,
   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:
@@ -55,11 +69,14 @@ class StartPageView : public views::View,
 
   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);
 };