Refactors the auto-launch logic and adds tests for it.

ui/app_list/views/search_result_list_view.h

 // Copyright (c) 2012 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_LIST_VIEW_H_
 #define UI_APP_LIST_VIEWS_SEARCH_RESULT_LIST_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/app_list/views/search_result_view_delegate.h"
 #include "ui/base/models/list_model_observer.h"
 #include "ui/gfx/animation/animation_delegate.h"
 #include "ui/views/view.h"
 
 namespace gfx {
 class LinearAnimation;
 }
 
 namespace app_list {
+namespace test {
+class SearchResultListViewTest;
+}
 
+class AppListViewDelegate;
 class SearchResultListViewDelegate;
 class SearchResultView;
 
 // SearchResultListView displays SearchResultList with a list of
 // SearchResultView.
-class SearchResultListView : public views::View,
-                             public gfx::AnimationDelegate,
-                             public ui::ListModelObserver,
-                             public SearchResultViewDelegate {
+class APP_LIST_EXPORT SearchResultListView : public views::View,
+                                             public gfx::AnimationDelegate,
+                                             public ui::ListModelObserver,
+                                             public SearchResultViewDelegate {
  public:
-  explicit SearchResultListView(SearchResultListViewDelegate* delegate);
+  explicit SearchResultListView(SearchResultListViewDelegate* delegate,

[xiyuan, 2014/02/14 04:55:55]

nit: Remove explicit.

[Jun Mukai, 2014/02/14 19:17:27]

Done.

+                                AppListViewDelegate* view_delegate);
   virtual ~SearchResultListView();
 
   void SetResults(AppListModel::SearchResults* results);
 
   void SetSelectedIndex(int selected_index);
 
+  void UpdateAutoLaunchState();
+
   bool IsResultViewSelected(const SearchResultView* result_view) const;
 
-  void SetAutoLaunchTimeout(const base::TimeDelta& timeout);
-  void CancelAutoLaunchTimeout();
-
   // Overridden from views::View:
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
 
  private:
+  friend class test::SearchResultListViewTest;
+
+  // Updates the auto launch states.
+  void SetAutoLaunchTimeout(const base::TimeDelta& timeout);
+  void CancelAutoLaunchTimeout();
+
   // Helper function to get SearchResultView at given |index|.
   SearchResultView* GetResultViewAt(int index);
 
   // Updates UI with model.
   void Update();
 
   // Schedules an Update call using |update_factory_|. Do nothing if there is a
   // pending call.
   void ScheduleUpdate();
 
+  // Forcibly auto-launch for test if it is in auto-launching state.
+  void ForceAutoLaunchForTest();
+
   // Overridden from views::View:
   virtual void Layout() OVERRIDE;
   virtual int GetHeightForWidth(int w) OVERRIDE;
   virtual void VisibilityChanged(
       views::View* starting_from, bool is_visible) OVERRIDE;
 
   // Overridden from gfx::AnimationDelegate:
   virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE;
   virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE;
 
   // Overridden from ui::ListModelObserver:
   virtual void ListItemsAdded(size_t start, size_t count) OVERRIDE;
   virtual void ListItemsRemoved(size_t start, size_t count) OVERRIDE;
   virtual void ListItemMoved(size_t index, size_t target_index) OVERRIDE;
   virtual void ListItemsChanged(size_t start, size_t count) OVERRIDE;
 
   // Overridden from SearchResultViewDelegate:
   virtual void SearchResultActivated(SearchResultView* view,
                                      int event_flags) OVERRIDE;
   virtual void SearchResultActionActivated(SearchResultView* view,
                                            size_t action_index,
                                            int event_flags) OVERRIDE;
   virtual void OnSearchResultInstalled(SearchResultView* view) OVERRIDE;
   virtual void OnSearchResultUninstalled(SearchResultView* view) OVERRIDE;
 
   SearchResultListViewDelegate* delegate_;  // Not owned.
+  AppListViewDelegate* view_delegate_;  // Not owned.
   AppListModel::SearchResults* results_;  // Owned by AppListModel.
 
   views::View* results_container_;
   views::View* auto_launch_indicator_;
   scoped_ptr<gfx::LinearAnimation> auto_launch_animation_;
 
   int last_visible_index_;
   int selected_index_;
 
   // The factory that consolidates multiple Update calls into one.
   base::WeakPtrFactory<SearchResultListView> update_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchResultListView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_SEARCH_RESULT_LIST_VIEW_H_