New AppListView Scroll Behavior.

ui/app_list/views/app_list_page.h

 // Copyright 2015 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_APP_LIST_PAGE_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_PAGE_H_
 
 #include "base/macros.h"
 #include "ui/app_list/app_list_export.h"
 #include "ui/app_list/app_list_model.h"
@@ skipping 50 matching lines @@
 
   // Returns the entire bounds of the contents view, in the contents view's
   // coordinate space.
   gfx::Rect GetFullContentsBounds() const;
 
   // Returns the default bounds of pages inside the contents view, in the
   // contents view's coordinate space. This is the area of the contents view
   // below the search box.
   gfx::Rect GetDefaultContentsBounds() const;
 
+  ContentsView* contents_view() const { return contents_view_; }

[vadimt, 2017/07/12 18:28:02]

My suggestion was to have a method returning contents_view()->IsStateActive(
         AppListModel::STATE_CUSTOM_LAUNCHER_PAGE);	      
AppListModel::STATE_CUSTOM_LAUNCHER_PAGE);

And not exposing contents_view directly...

Does this make sense?

[newcomer, 2017/07/13 23:37:17]

Done.

+
  private:
   ContentsView* contents_view_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListPage);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_PAGE_H_