Fix the absence of padding on some UI buttons.

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 570 matching lines @@
       LayoutDelegate::Metric::DIALOG_BUTTON_MARGIN);
   // Titles are inset at the top and sides, but not at the bottom.
   return gfx::Insets(top, side, 0, side);
 }
 
 gfx::Insets ChromeViewsDelegate::GetBubbleDialogMargins() const {
   return gfx::Insets(LayoutDelegate::Get()->GetMetric(
       LayoutDelegate::Metric::PANEL_CONTENT_MARGIN));
 }
 
+int ChromeViewsDelegate::GetButtonMinimumWidth() const {
+  return LayoutDelegate::Get()->GetMetric(
+      LayoutDelegate::Metric::BUTTON_MINIMUM_WIDTH);
+}
+
 int ChromeViewsDelegate::GetDialogButtonMinimumWidth() const {
   return LayoutDelegate::Get()->GetMetric(
       LayoutDelegate::Metric::DIALOG_BUTTON_MINIMUM_WIDTH);
 }
 
 int ChromeViewsDelegate::GetButtonHorizontalPadding() const {
   return LayoutDelegate::Get()->GetMetric(
       LayoutDelegate::Metric::BUTTON_HORIZONTAL_PADDING);
 }
 
 #if !defined(USE_ASH)
 views::Widget::InitParams::WindowOpacity
 ChromeViewsDelegate::GetOpacityForInitParams(
     const views::Widget::InitParams& params) {
   return views::Widget::InitParams::OPAQUE_WINDOW;
 }
 #endif