Allow scroll events to open custom launcher pages.

ui/app_list/views/app_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_APP_LIST_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_
 
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
@@ skipping 86 matching lines @@
 
   views::Widget* search_box_widget() const { return search_box_widget_; }
 
   // Overridden from views::View:
   gfx::Size GetPreferredSize() const override;
   void Paint(gfx::Canvas* canvas, const views::CullSet& cull_set) override;
   void OnThemeChanged() override;
 
   // WidgetDelegate overrides:
   bool ShouldHandleSystemCommands() const override;
+  bool ShouldDescendIntoChildForEventHandling(
+      gfx::NativeView child,
+      const gfx::Point& location) override;
 
   // Overridden from AppListViewDelegateObserver:
   void OnProfilesChanged() override;
   void OnShutdown() override;
 
   void Prerender();
 
   void SetProfileByPath(const base::FilePath& profile_path);
 
   void AddObserver(AppListViewObserver* observer);
@@ skipping 65 matching lines @@
 
   // For UMA and testing. If non-null, triggered when the app list is painted.
   base::Closure next_paint_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_