ash: Change auto to not deduce raw pointers.

ash/system/toast/toast_overlay.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/system/toast/toast_overlay.h"
 
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm_root_window_controller.h"
 #include "ash/common/wm_shell.h"
@@ skipping 155 matching lines @@
               ? l10n_util::GetStringUTF16(IDS_ASH_TOAST_DISMISS_BUTTON)
               : base::UTF8ToUTF16(dismiss_text))) {
   ToastOverlayLabel* label = new ToastOverlayLabel(text);
   label->SetMaximumWidth(
       GetMaximumSize().width() - button_->GetPreferredSize().width() -
       kToastHorizontalSpacing * 2 - kToastHorizontalSpacing * 2);
   AddChildView(label);
 
   AddChildView(button_);
 
-  auto layout = new views::BoxLayout(views::BoxLayout::kHorizontal, 0, 0, 0);
+  auto* layout = new views::BoxLayout(views::BoxLayout::kHorizontal, 0, 0, 0);
   SetLayoutManager(layout);
   layout->SetFlexForView(label, 1);
   layout->SetFlexForView(button_, 0);
 }
 
 ToastOverlayView::~ToastOverlayView() {}
 
 void ToastOverlayView::OnPaint(gfx::Canvas* canvas) {
   SkPaint paint;
   paint.setStyle(SkPaint::kFill_Style);
@@ skipping 100 matching lines @@
 
 views::Widget* ToastOverlay::widget_for_testing() {
   return overlay_widget_.get();
 }
 
 void ToastOverlay::ClickDismissButtonForTesting(const ui::Event& event) {
   overlay_view_->button()->NotifyClick(event);
 }
 
 }  // namespace ash