AppListController refactoring part 1: AppListShower implementation.

ui/app_list/app_list_shower_delegate.h

Index: ui/app_list/app_list_shower_delegate.h
diff --git a/ui/app_list/app_list_shower_delegate.h b/ui/app_list/app_list_shower_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..ae50ab80a8685747680b7a981433c9f1e69dc144
--- /dev/null
+++ b/ui/app_list/app_list_shower_delegate.h
@@ -0,0 +1,47 @@
+// Copyright 2016 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_APP_LIST_SHOWER_DELEGATE_H_
+#define UI_APP_LIST_APP_LIST_SHOWER_DELEGATE_H_
+
+#include "ui/app_list/app_list_export.h"
+
+namespace aura {
+class Window;
+}
+
+namespace gfx {
+class Vector2d;
+}
+
+namespace app_list {
+class AppListView;

[xiyuan, 2016/03/24 20:31:11]

nit: insert an empty line since we have an empty line at the namespace end.

[mfomitchev, 2016/03/29 17:33:31]

Done.

+
+class APP_LIST_EXPORT AppListShowerDelegate {

[xiyuan, 2016/03/24 20:31:11]

nit: document the class?

[mfomitchev, 2016/03/29 17:33:31]

Done.

+ public:
+  virtual ~AppListShowerDelegate() {}
+
+  // Called to initialize the layout of the app list.
+  void virtual Init(AppListView* view,
+                    aura::Window* root_window,
+                    int current_apps_page) = 0;
+
+  // Called when app list is shown.
+  void virtual OnShown(aura::Window* root_window) = 0;
+
+  // Called when app list is dismissed
+  void virtual OnDismissed() = 0;
+
+  // Update app list bounds if necessary.
+  void virtual UpdateBounds() = 0;
+
+  // Returns the offset vector by which the app list window should animate
+  // when it gets hidden.
+  virtual gfx::Vector2d GetVisibilityAnimationOffset(
+      aura::Window* root_window) = 0;
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_APP_LIST_SHOWER_DELEGATE_H_