Fix tests to ship Aura overlay scrollbars for ChromeOS

content/public/test/render_view_test.cc

Index: content/public/test/render_view_test.cc
diff --git a/content/public/test/render_view_test.cc b/content/public/test/render_view_test.cc
index c9fb5d4371bed3c688df160f301c558c3f4e401e..5e86a856652c2745c965dfd8082a4f6f937210fb 100644
--- a/content/public/test/render_view_test.cc
+++ b/content/public/test/render_view_test.cc
@@ -46,6 +46,7 @@
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "third_party/WebKit/public/web/WebKit.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
+#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
 #include "third_party/WebKit/public/web/WebScriptSource.h"
 #include "third_party/WebKit/public/web/WebView.h"
 #include "ui/base/resource/resource_bundle.h"
@@ -65,6 +66,7 @@ using blink::WebGestureEvent;
 using blink::WebInputEvent;
 using blink::WebLocalFrame;
 using blink::WebMouseEvent;
+using blink::WebRuntimeFeatures;
 using blink::WebScriptSource;
 using blink::WebString;
 using blink::WebURLRequest;
@@ -234,6 +236,11 @@ void RenderViewTest::SetUp() {
   // because it uses blink internally.
   blink::initialize(blink_platform_impl_.Get());
 
+  // 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);
+
   content_client_.reset(CreateContentClient());
   content_browser_client_.reset(CreateContentBrowserClient());
   content_renderer_client_.reset(CreateContentRendererClient());