Add VectorIconButton functionality to ImageButton.

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 250 matching lines @@
   }
   NOTREACHED();
   return 0;
 }
 
 int ChromeViewsDelegate::GetDefaultDistanceMetric(
     views::DistanceMetric metric) const {
   return views::ViewsDelegate::GetDistanceMetric(metric);
 }
 
+gfx::Insets ChromeViewsDelegate::GetButtonMargins() const {
+  return gfx::Insets(
+      LayoutDelegate::Get()->GetMetric(LayoutDelegate::Metric::BUTTON_MARGIN));
+}
+
 #if !defined(OS_CHROMEOS)
 views::Widget::InitParams::WindowOpacity
 ChromeViewsDelegate::GetOpacityForInitParams(
     const views::Widget::InitParams& params) {
   return views::Widget::InitParams::OPAQUE_WINDOW;
 }
 #endif