Enable overlay scrollbars on ChromeOS

chrome/renderer/safe_browsing/threat_dom_details_browsertest.cc

 // Copyright (c) 2011 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/renderer/safe_browsing/threat_dom_details.h"
 
 #include <memory>
 
 #include "base/strings/stringprintf.h"
 #include "chrome/common/safe_browsing/safebrowsing_messages.h"
 #include "chrome/test/base/chrome_render_view_test.h"
 #include "content/public/renderer/render_view.h"
 #include "net/base/escape.h"
+#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
+#include "ui/native_theme/native_theme_switches.h"
 
 typedef ChromeRenderViewTest ThreatDOMDetailsTest;
 
 TEST_F(ThreatDOMDetailsTest, Everything) {
+  blink::WebRuntimeFeatures::enableOverlayScrollbars(
+      ui::IsOverlayScrollbarEnabled());
   std::unique_ptr<safe_browsing::ThreatDOMDetails> details(
       safe_browsing::ThreatDOMDetails::Create(view_->GetMainRenderFrame()));
   // Lower kMaxNodes for the test. Loading 500 subframes in a
   // debug build takes a while.
   details->kMaxNodes = 50;
 
   const char urlprefix[] = "data:text/html;charset=utf-8,";
 
   {
     // A page with an internal script
@@ skipping 96 matching lines @@
               "\"></script>";
     }
     GURL url(urlprefix + html);
 
     LoadHTML(html.c_str());
     std::vector<SafeBrowsingHostMsg_ThreatDOMDetails_Node> params;
     details->ExtractResources(&params);
     ASSERT_EQ(51u, params.size());
   }
 }