Revert 115515 - [Aura] Implement views-based applist.

ui/aura_shell/shell_delegate.h

Index: ui/aura_shell/shell_delegate.h
===================================================================
--- ui/aura_shell/shell_delegate.h	(revision 115517)
+++ ui/aura_shell/shell_delegate.h	(working copy)
@@ -19,8 +19,6 @@
 
 namespace aura_shell {
 
-class AppListModel;
-class AppListViewDelegate;
 struct LauncherItem;
 
 // Delegate of the Shell.
@@ -41,19 +39,10 @@
 
   // Invoked to create app list widget. The Delegate calls the callback
   // when the widget is ready to show.
-  // Deprecated.
-  // TODO(xiyuan): Clean this up when switching to views app list.
   virtual void RequestAppListWidget(
       const gfx::Rect& bounds,
       const SetWidgetCallback& callback) = 0;
 
-  // Invoked to ask the delegate to populate the |model|.
-  virtual void BuildAppListModel(AppListModel* model) = 0;
-
-  // Invoked to create an AppListViewDelegate. Shell takes the ownership of
-  // the created delegate.
-  virtual AppListViewDelegate* CreateAppListViewDelegate() = 0;
-
   // Invoked when the user clicks on a window entry in the launcher.
   virtual void LauncherItemClicked(const LauncherItem& item) = 0;