Enable MarkNonSecureAs experiment on waterfall

chrome/browser/ssl/security_state_tab_helper_browser_tests.cc

Index: chrome/browser/ssl/security_state_tab_helper_browser_tests.cc
diff --git a/chrome/browser/ssl/security_state_tab_helper_browser_tests.cc b/chrome/browser/ssl/security_state_tab_helper_browser_tests.cc
index 8f3237c0fe8e2820a04665f3865843c13d102839..4bec79ea5b253dea4ff7c94ed54c55443f536193 100644
--- a/chrome/browser/ssl/security_state_tab_helper_browser_tests.cc
+++ b/chrome/browser/ssl/security_state_tab_helper_browser_tests.cc
@@ -281,6 +281,9 @@ class SecurityStateTabHelperTest : public CertVerifierBrowserTest {
   void SetUpCommandLine(base::CommandLine* command_line) override {
     // Browser will both run and display insecure content.
     command_line->AppendSwitch(switches::kAllowRunningInsecureContent);
+    command_line->AppendSwitchASCII(
+        security_state::switches::kMarkHttpAs,
+        security_state::switches::kMarkHttpAsNeutral);
   }
 
  protected: