ash: Move shelf alignment and auto-hide calls from Shell to Shelf

ash/root_window_controller.cc

 // 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.
 
 #include "ash/root_window_controller.h"
 
 #include <queue>
 #include <vector>
 
 #include "ash/ash_constants.h"
@@ skipping 438 matching lines @@
       docked_layout_manager_->AddObserver(
           shelf_widget_->shelf_layout_manager());
   }
 
   // Notify shell observers that the shelf has been created.
   Shell::GetInstance()->OnShelfCreatedForRootWindow(GetRootWindow());
 
   shelf_widget_->PostCreateShelf();
 }
 
+Shelf* RootWindowController::GetShelf() const {
+  // TODO(jamescook): Shelf should be owned by this class, not by ShelfWidget.
+  return shelf_widget_->shelf();
+}
+
 void RootWindowController::UpdateAfterLoginStatusChange(
     user::LoginStatus status) {
   if (status != user::LOGGED_IN_NONE)
     mouse_event_target_.reset();
   if (shelf_widget_->status_area_widget())
     shelf_widget_->status_area_widget()->UpdateAfterLoginStatusChange(status);
 }
 
 void RootWindowController::HandleInitialDesktopBackgroundAnimationStarted() {
 #if defined(OS_CHROMEOS)
@@ skipping 614 matching lines @@
     aura::Window* primary_root_window = Shell::GetInstance()
                                             ->window_tree_host_manager()
                                             ->GetPrimaryRootWindow();
     return GetRootWindowSettings(primary_root_window)->controller;
   }
 
   return GetRootWindowSettings(root_window)->controller;
 }
 
 }  // namespace ash