Notify launcher page with onTransitionChanged event

ui/app_list/views/contents_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_CONTENTS_VIEW_H_
 #define UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_
 
 #include <map>
 
 #include "base/basictypes.h"
@@ skipping 31 matching lines @@
 // between them.
 class APP_LIST_EXPORT ContentsView : public views::View,
                                      public PaginationModelObserver {
  public:
   ContentsView(AppListMainView* app_list_main_view);
   ~ContentsView() override;
 
   // Initialize the pages of the launcher. In the experimental launcher, should
   // be called after set_contents_switcher_view(), or switcher buttons will not
   // be created.
-  void Init(AppListModel* model, AppListViewDelegate* view_delegate);
+  void Init(AppListModel* model);
 
   // The app list gets closed and drag and drop operations need to be cancelled.
   void CancelDrag();
 
   // If |drag_and_drop| is not NULL it will be called upon drag and drop
   // operations outside the application list.
   void SetDragAndDropHostOfCurrentAppList(
       ApplicationDragAndDropHost* drag_and_drop_host);
 
   void SetContentsSwitcherView(ContentsSwitcherView* contents_switcher_view);
@@ skipping 61 matching lines @@
   // Invoked when active view is changed.
   void ActivePageChanged(bool show_search_results);
 
   // Returns the size of the default content area.
   gfx::Size GetDefaultContentsSize() const;
 
   // Gets the origin (the off-screen resting place) for a given launcher page
   // with index |page_index|.
   gfx::Rect GetOffscreenPageBounds(int page_index) const;
 
+  // Notifies the view delegate that the custom launcher page's animation has
+  // changed.
+  void NotifyCustomLauncherPageAnimationChanged(double progress,
+                                                int current_page,
+                                                int target_page);
+
   // Calculates and sets the bounds for the subviews. If there is currently an
   // animation, this positions the views as appropriate for the current frame.
   void UpdatePageBounds();
 
   // Adds |view| as a new page to the end of the list of launcher pages. The
   // view is inserted as a child of the ContentsView, and a button with
   // |resource_id| is added to the ContentsSwitcherView. There is no name
   // associated with the page. Returns the index of the new page.
   int AddLauncherPage(views::View* view, int resource_id);
 
@@ skipping 32 matching lines @@
 
   // Manages the pagination for the launcher pages.
   PaginationModel pagination_model_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentsView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_CONTENTS_VIEW_H_