Fix shelf alignment and auto-hide initialization.

ash/shell/shell_delegate_impl.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/shell/shell_delegate_impl.h"
 
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/default_accessibility_delegate.h"
 #include "ash/common/gpu_support_stub.h"
 #include "ash/common/palette_delegate.h"
@@ skipping 145 matching lines @@
   base::MessageLoop::current()->QuitWhenIdle();
 }
 
 keyboard::KeyboardUI* ShellDelegateImpl::CreateKeyboardUI() {
   return new TestKeyboardUI;
 }
 
 void ShellDelegateImpl::OpenUrlFromArc(const GURL& url) {}
 
 ShelfDelegate* ShellDelegateImpl::CreateShelfDelegate(ShelfModel* model) {
-  shelf_delegate_ = new test::TestShelfDelegate(model);
-  return shelf_delegate_;
+  return new test::TestShelfDelegate();
 }
 
 SystemTrayDelegate* ShellDelegateImpl::CreateSystemTrayDelegate() {
   return new DefaultSystemTrayDelegate;
 }
 
 std::unique_ptr<WallpaperDelegate>
 ShellDelegateImpl::CreateWallpaperDelegate() {
   return base::MakeUnique<DefaultWallpaperDelegate>();
 }
@@ skipping 33 matching lines @@
   return true;
 }
 
 void ShellDelegateImpl::SetTouchscreenEnabledInPrefs(bool enabled,
                                                      bool use_local_state) {}
 
 void ShellDelegateImpl::UpdateTouchscreenStatusFromPrefs() {}
 
 }  // namespace shell
 }  // namespace ash