Avoid changing enabled features while the browser is already running.

content/browser/frame_host/data_url_navigation_browsertest.cc

Index: content/browser/frame_host/data_url_navigation_browsertest.cc
diff --git a/content/browser/frame_host/data_url_navigation_browsertest.cc b/content/browser/frame_host/data_url_navigation_browsertest.cc
index d500fb2ba21fc4e4ae10719fe84c5cc29a573e72..91ef6df1878852e3d46a699c4b6c67dc1a70e086 100644
--- a/content/browser/frame_host/data_url_navigation_browsertest.cc
+++ b/content/browser/frame_host/data_url_navigation_browsertest.cc
@@ -507,13 +507,28 @@ IN_PROC_BROWSER_TEST_F(DataUrlNavigationBrowserTest, HTML_Navigation_Block) {
       NAVIGATION_BLOCKED);
 }
 
+class DataUrlNavigationAllowedFromContentTest
+    : public DataUrlNavigationBrowserTest {
+ public:
+  DataUrlNavigationAllowedFromContentTest() {}
+
+ protected:
+  void SetUp() override {
+    scoped_feature_list_.InitAndEnableFeature(
+        features::kAllowContentInitiatedDataUrlNavigations);
+    DataUrlNavigationBrowserTest::SetUp();
+  }
+
+ private:
+  base::test::ScopedFeatureList scoped_feature_list_;
+
+  DISALLOW_COPY_AND_ASSIGN(DataUrlNavigationAllowedFromContentTest);
+};
+
 // Tests that a content initiated navigation to a data URL is allowed if
 // blocking is disabled with a feature flag.
-IN_PROC_BROWSER_TEST_F(DataUrlNavigationBrowserTest,
-                       HTML_Navigation_Allow_FeatureFlag) {
-  base::test::ScopedFeatureList feature_list;
-  feature_list.InitAndEnableFeature(
-      features::kAllowContentInitiatedDataUrlNavigations);
+IN_PROC_BROWSER_TEST_F(DataUrlNavigationAllowedFromContentTest,
+                       HTML_Navigation) {
   NavigateToURL(shell(),
                 embedded_test_server()->GetURL("/data_url_navigations.html"));
   ExecuteScriptAndCheckNavigation(