[Cleanup] Move all browsertests to use ScopedFeatureList to modify features

chrome/browser/net/predictor_browsertest.cc

Index: chrome/browser/net/predictor_browsertest.cc
diff --git a/chrome/browser/net/predictor_browsertest.cc b/chrome/browser/net/predictor_browsertest.cc
index fe2a9ba0584019ab850cee78c04c7aea776260ea..f0c9ab064d85ba3333c0711b1e94e31f7783fa21 100644
--- a/chrome/browser/net/predictor_browsertest.cc
+++ b/chrome/browser/net/predictor_browsertest.cc
@@ -23,6 +23,7 @@
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
 #include "base/synchronization/lock.h"
+#include "base/test/scoped_feature_list.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
@@ -32,6 +33,7 @@
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/chrome_features.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
@@ -509,6 +511,7 @@ class PredictorBrowserTest : public InProcessBrowserTest {
     rule_based_resolver_proc_->AddSimulatedFailure("*.notfound");
     rule_based_resolver_proc_->AddRuleWithLatency("delay.google.com",
                                                   "127.0.0.1", 1000 * 60);
+    scoped_feature_list_.InitAndEnableFeature(features::kPreconnectMore);
   }
 
  protected:
@@ -520,8 +523,6 @@ class PredictorBrowserTest : public InProcessBrowserTest {
   void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(
         switches::kEnableExperimentalWebPlatformFeatures);
-    command_line->AppendSwitchASCII(switches::kEnableFeatures,
-                                    "PreconnectMore");
   }
 
   void SetUpOnMainThread() override {
@@ -797,6 +798,7 @@ class PredictorBrowserTest : public InProcessBrowserTest {
   std::unique_ptr<net::EmbeddedTestServer> cross_site_test_server_;
   std::unique_ptr<CrossSitePredictorObserver> observer_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+  base::test::ScopedFeatureList scoped_feature_list_;
 };
 
 IN_PROC_BROWSER_TEST_F(PredictorBrowserTest, SingleLookupTest) {