Use an InsetMetric instead of a constant for vector button padding.

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/logging.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 213 matching lines @@
       const int top = layout_delegate->GetMetric(
           LayoutDelegate::Metric::PANEL_CONTENT_MARGIN);
       const int side = layout_delegate->GetMetric(
           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);
     }
     case views::InsetsMetric::BUBBLE_DIALOG:
       return gfx::Insets(layout_delegate->GetMetric(
           LayoutDelegate::Metric::PANEL_CONTENT_MARGIN));
+    case views::InsetsMetric::VECTOR_IMAGE_BUTTON_PADDING:
+      return gfx::Insets(layout_delegate->GetMetric(
+          LayoutDelegate::Metric::VECTOR_IMAGE_BUTTON_PADDING));
   }
   NOTREACHED();
   return gfx::Insets();
 }
 
 int ChromeViewsDelegate::GetDistanceMetric(views::DistanceMetric metric) const {
   switch (metric) {
     case views::DistanceMetric::CLOSE_BUTTON_MARGIN:
       return LayoutDelegate::Get()->GetMetric(
           LayoutDelegate::Metric::DIALOG_CLOSE_BUTTON_MARGIN);
@@ skipping 34 matching lines @@
   return views::ViewsDelegate::GetDistanceMetric(metric);
 }
 
 #if !defined(OS_CHROMEOS)
 views::Widget::InitParams::WindowOpacity
 ChromeViewsDelegate::GetOpacityForInitParams(
     const views::Widget::InitParams& params) {
   return views::Widget::InitParams::OPAQUE_WINDOW;
 }
 #endif