Harmony - update Chrome Cleanup tool prompt dialog.

chrome/browser/ui/views/harmony/layout_delegate.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 "chrome/browser/ui/views/harmony/layout_delegate.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "chrome/browser/ui/views/chrome_views_delegate.h"
 #include "chrome/browser/ui/views/harmony/harmony_layout_delegate.h"
@@ skipping 59 matching lines @@
 
 views::GridLayout::Alignment LayoutDelegate::GetControlLabelGridAlignment()
     const {
   return views::GridLayout::TRAILING;
 }
 
 bool LayoutDelegate::UseExtraDialogPadding() const {
   return true;
 }
 
+bool LayoutDelegate::ShouldShowWindowIcon() const {
+  return true;
+}
+
 bool LayoutDelegate::IsHarmonyMode() const {
   return false;
 }
 
 int LayoutDelegate::GetDialogPreferredWidth(DialogWidth width) const {
   return 0;
 }