Enable overlay scrollbars on ChromeOS

chrome/renderer/autofill/form_classifier_browsertest.cc

Index: chrome/renderer/autofill/form_classifier_browsertest.cc
diff --git a/chrome/renderer/autofill/form_classifier_browsertest.cc b/chrome/renderer/autofill/form_classifier_browsertest.cc
index 615b61f24a888a03e6781148ceb5db9c2d57b0b7..647ae7ad0195a2af813413a7fa7e31901ebf1823 100644
--- a/chrome/renderer/autofill/form_classifier_browsertest.cc
+++ b/chrome/renderer/autofill/form_classifier_browsertest.cc
@@ -10,6 +10,8 @@
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFormElement.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
+#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
+#include "ui/native_theme/native_theme_switches.h"
 
 namespace autofill {
 
@@ -17,6 +19,12 @@ class FormClassifierTest : public ChromeRenderViewTest {
  public:
   FormClassifierTest() {}
 
+  void SetUp() override {
+    blink::WebRuntimeFeatures::enableOverlayScrollbars(
+        ui::IsOverlayScrollbarEnabled());
+    ChromeRenderViewTest::SetUp();
+  }
+
   void TearDown() override {
     LoadHTML("");
     ChromeRenderViewTest::TearDown();