Position close buttons in bubbles based on a layout delegate constant.

chrome/browser/ui/views/chrome_views_delegate.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 "chrome/browser/ui/views/chrome_views_delegate.h"
 
 #include <memory>
 
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 561 matching lines @@
   if (ui::MaterialDesignController::IsSecondaryUiMaterial())
     return gfx::Insets(HarmonyLayoutDelegate::kHarmonyLayoutUnit);
   return ViewsDelegate::GetBubbleDialogMargins();
 }
 
 gfx::Insets ChromeViewsDelegate::GetButtonPadding() const {
   return gfx::Insets(LayoutDelegate::Get()->GetMetric(
       LayoutDelegate::Metric::BUTTON_PADDING));
 }
 
+int ChromeViewsDelegate::GetCloseButtonMargin() const {
+  return LayoutDelegate::Get()->GetMetric(
+      LayoutDelegate::Metric::DIALOG_CLOSE_BUTTON_MARGIN);
+}
+
 #if !defined(USE_ASH)
 views::Widget::InitParams::WindowOpacity
 ChromeViewsDelegate::GetOpacityForInitParams(
     const views::Widget::InitParams& params) {
   return views::Widget::InitParams::OPAQUE_WINDOW;
 }
 #endif