Enable overlay scrollbars on ChromeOS

content/renderer/render_view_browsertest.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 <stddef.h>
 #include <stdint.h>
 #include <tuple>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 66 matching lines @@
 #include "third_party/WebKit/public/web/WebPerformance.h"
 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
 #include "third_party/WebKit/public/web/WebScriptSource.h"
 #include "third_party/WebKit/public/web/WebSettings.h"
 #include "third_party/WebKit/public/web/WebView.h"
 #include "third_party/WebKit/public/web/WebWindowFeatures.h"
 #include "ui/events/event.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/codec/jpeg_codec.h"
 #include "ui/gfx/range/range.h"
+#include "ui/native_theme/native_theme_switches.h"
 
 #if defined(USE_AURA) && defined(USE_X11)
 #include <X11/Xlib.h>
 #include "ui/events/event_constants.h"
 #include "ui/events/keycodes/keyboard_code_conversion.h"
 #include "ui/events/test/events_test_utils.h"
 #include "ui/events/test/events_test_utils_x11.h"
 #endif
 
 #if defined(USE_OZONE)
@@ skipping 116 matching lines @@
     mock_keyboard_.reset(new MockKeyboard());
   }
 
   ~RenderViewImplTest() override {}
 
   void SetUp() override {
     // Enable Blink's experimental and test only features so that test code
     // does not have to bother enabling each feature.
     WebRuntimeFeatures::enableExperimentalFeatures(true);
     WebRuntimeFeatures::enableTestOnlyFeatures(true);
+    WebRuntimeFeatures::enableOverlayScrollbars(
+        ui::IsOverlayScrollbarEnabled());
     RenderViewTest::SetUp();
   }
 
   RenderViewImpl* view() {
     return static_cast<RenderViewImpl*>(view_);
   }
 
   TestRenderFrame* frame() {
     return static_cast<TestRenderFrame*>(view()->GetMainRenderFrame());
   }
@@ skipping 2256 matching lines @@
   ExpectPauseAndResume(3);
   blink::WebScriptSource source2(
       WebString::fromUTF8("function func2() { func1(); }; func2();"));
   frame()->GetWebFrame()->executeScriptInIsolatedWorld(17, &source2, 1, 1);
 
   EXPECT_FALSE(IsPaused());
   Detach();
 }
 
 }  // namespace content