app_list: remove AppsGridViewDelegate

changes:
after go/croscl/564485, AppsGridViewDelegate is no longer needed, remove
it in this CL.

Bug: 735702
TEST: still compiles
Change-Id: I8aca563c6951283157121981bebd53b39d5ab05e
Reviewed-on: https://chromium-review.googlesource.com/571058Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Qiang(Joe) Xu <warx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#486582}

ui/app_list/BUILD.gn

@@ -119,7 +119,6 @@ component("app_list") {
       "views/apps_container_view.h",
       "views/apps_grid_view.cc",
       "views/apps_grid_view.h",
-      "views/apps_grid_view_delegate.h",
       "views/apps_grid_view_folder_delegate.h",
       "views/contents_view.cc",
       "views/contents_view.h",

ui/app_list/views/app_list_main_view.h

@@ -12,7 +12,6 @@
 #include "base/timer/timer.h"
 #include "ui/app_list/app_list_export.h"
 #include "ui/app_list/app_list_model_observer.h"
-#include "ui/app_list/views/apps_grid_view_delegate.h"
 #include "ui/app_list/views/search_box_view_delegate.h"
 #include "ui/app_list/views/search_result_list_view_delegate.h"
 #include "ui/views/view.h"
@@ -31,7 +30,6 @@ class SearchBoxView;
 // AppListMainView contains the normal view of the app list, which is shown
 // when the user is signed in.
 class APP_LIST_EXPORT AppListMainView : public views::View,
-                                        public AppsGridViewDelegate,
                                         public AppListModelObserver,
                                         public SearchBoxViewDelegate,
                                         public SearchResultListViewDelegate {
@@ -75,9 +73,14 @@ class APP_LIST_EXPORT AppListMainView : public views::View,
   void OnCustomLauncherPageEnabledStateChanged(bool enabled) override;
   void OnSearchEngineIsGoogleChanged(bool is_google) override;
 
-  // Overridden from AppsGridViewDelegate:
-  void ActivateApp(AppListItem* item, int event_flags) override;
-  void CancelDragInActiveFolder() override;
+  // Invoked when an item is activated on the grid view. |event_flags| contains
+  // the flags of the keyboard/mouse event that triggers the activation request.
+  void ActivateApp(AppListItem* item, int event_flags);
+
+  // Called by the root grid view to cancel a drag that started inside a folder.
+  // This can occur when the root grid is visible for a reparent and its model
+  // changes, necessitating a cancel of the drag operation.
+  void CancelDragInActiveFolder();
 
  private:
   // Adds the ContentsView.

ui/app_list/views/apps_grid_view.cc

@@ -22,7 +22,6 @@
 #include "ui/app_list/views/app_list_folder_view.h"
 #include "ui/app_list/views/app_list_item_view.h"
 #include "ui/app_list/views/app_list_main_view.h"
-#include "ui/app_list/views/apps_grid_view_delegate.h"
 #include "ui/app_list/views/contents_view.h"
 #include "ui/app_list/views/indicator_chip_view.h"
 #include "ui/app_list/views/page_switcher_horizontal.h"

ui/app_list/views/apps_grid_view_delegate.h

-// Copyright 2013 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_APPS_GRID_VIEW_DELEGATE_H_
-#define UI_APP_LIST_VIEWS_APPS_GRID_VIEW_DELEGATE_H_
-
-#include <string>
-
-#include "base/callback_forward.h"
-#include "ui/app_list/app_list_export.h"
-
-namespace app_list {
-
-class AppListItem;
-
-class APP_LIST_EXPORT AppsGridViewDelegate {
- public:
-  // Invoked when an item is activated on the grid view. |event_flags| contains
-  // the flags of the keyboard/mouse event that triggers the activation request.
-  virtual void ActivateApp(AppListItem* item, int event_flags) = 0;
-
-  // Called by the root grid view to cancel a drag that started inside a folder.
-  // This can occur when the root grid is visible for a reparent and its model
-  // changes, necessitating a cancel of the drag operation.
-  virtual void CancelDragInActiveFolder() = 0;
-
- protected:
-  virtual ~AppsGridViewDelegate() {}
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_VIEWS_APPS_GRID_VIEW_DELEGATE_H_