Fix shelf alignment and auto-hide initialization.

ash/common/shelf/wm_shelf.cc

 // Copyright 2016 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/common/shelf/wm_shelf.h"
 
 #include "ash/common/shelf/shelf_controller.h"
 #include "ash/common/shelf/shelf_delegate.h"
 #include "ash/common/shelf/shelf_item_delegate.h"
 #include "ash/common/shelf/shelf_layout_manager.h"
@@ skipping 115 matching lines @@
 void WmShelf::DestroyShelfWidget() {
   shelf_widget_.reset();
 }
 
 void WmShelf::CreateShelfView() {
   DCHECK(shelf_layout_manager_);
   DCHECK(shelf_widget_);
   DCHECK(!shelf_view_);
   shelf_view_ = shelf_widget_->CreateShelfView();
   shelf_locking_manager_.reset(new ShelfLockingManager(this));
-  // When the shelf is created the alignment is unlocked. Chrome will update the
-  // alignment later from preferences.
-  alignment_ = SHELF_ALIGNMENT_BOTTOM;
   WmShell::Get()->shelf_controller()->NotifyShelfCreated(this);
 }
 
 void WmShelf::ShutdownShelf() {
   DCHECK(shelf_view_);
   shelf_locking_manager_.reset();
   shelf_view_ = nullptr;
 }
 
 bool WmShelf::IsShelfInitialized() const {
@@ skipping 225 matching lines @@
 
 void WmShelf::OnBackgroundUpdated(ShelfBackgroundType background_type,
                                   AnimationChangeType change_type) {
   if (background_type == GetBackgroundType())
     return;
   for (auto& observer : observers_)
     observer.OnBackgroundTypeChanged(background_type, change_type);
 }
 
 }  // namespace ash