Enable runtime features with status=test before WebKit

content/shell/renderer/layout_test/layout_test_render_thread_observer.cc

Index: content/shell/renderer/layout_test/layout_test_render_thread_observer.cc
diff --git a/content/shell/renderer/layout_test/layout_test_render_thread_observer.cc b/content/shell/renderer/layout_test/layout_test_render_thread_observer.cc
index abcbc95618e53a3cf72f732df0d320cf2a69ba03..dd51b6dbacf1df6bfc7f953946529ab716915fb8 100644
--- a/content/shell/renderer/layout_test/layout_test_render_thread_observer.cc
+++ b/content/shell/renderer/layout_test/layout_test_render_thread_observer.cc
@@ -15,11 +15,9 @@
 #include "content/shell/common/layout_test/layout_test_switches.h"
 #include "content/shell/common/shell_messages.h"
 #include "third_party/WebKit/public/web/WebKit.h"
-#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
 #include "v8/include/v8.h"
 
 using blink::WebFrame;
-using blink::WebRuntimeFeatures;
 
 namespace content {
 
@@ -43,11 +41,6 @@ LayoutTestRenderThreadObserver::LayoutTestRenderThreadObserver() {
   std::string flags("--expose-gc");
   v8::V8::SetFlagsFromString(flags.c_str(), static_cast<int>(flags.size()));
 
-  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kStableReleaseMode)) {
-    WebRuntimeFeatures::enableTestOnlyFeatures(true);
-  }
-
   test_interfaces_.reset(new test_runner::WebTestInterfaces);
   test_interfaces_->ResetAll();
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(