For some vector icons, get the size from the vector definition.

chrome/browser/ui/views/extensions/extension_install_dialog_view.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/extensions/extension_install_dialog_view.h"
 
 #include <stddef.h>
 #include <algorithm>
 #include <string>
 #include <utility>
@@ skipping 749 matching lines @@
 
   if (slide_animation_.IsShowing())
     slide_animation_.Hide();
   else
     slide_animation_.Show();
 }
 
 void ExpandableContainerView::UpdateArrowToggle(bool expanded) {
   gfx::ImageSkia icon = gfx::CreateVectorIcon(
       expanded ? gfx::VectorIconId::FIND_PREV : gfx::VectorIconId::FIND_NEXT,
-      16, gfx::kChromeIconGrey);
+      gfx::kChromeIconGrey);
   arrow_toggle_->SetImage(views::Button::STATE_NORMAL, &icon);
 }
 
 // static
 ExtensionInstallPrompt::ShowDialogCallback
 ExtensionInstallPrompt::GetDefaultShowDialogCallback() {
   return base::Bind(&ShowExtensionInstallDialogImpl);
 }