If replacing a safebrowsing interstitial, don't call DontProceed on the old one.

chrome/browser/safe_browsing/safe_browsing_blocking_page_test.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This test creates a fake safebrowsing service, where we can inject known-
 // threat urls.  It then uses a real browser to go to these urls, and sends
 // "goback" or "proceed" commands and verifies they work.
 
 #include <algorithm>
 
@@ skipping 899 matching lines @@
 IN_PROC_BROWSER_TEST_P(SafeBrowsingBlockingPageBrowserTest,
                        ReportingDisabledByPolicy) {
   SetExtendedReportingPref(browser()->profile()->GetPrefs(), true);
   browser()->profile()->GetPrefs()->SetBoolean(
       prefs::kSafeBrowsingExtendedReportingOptInAllowed, false);
 
   TestReportingDisabledAndDontProceed(
       net::URLRequestMockHTTPJob::GetMockUrl(kEmptyPage));
 }
 
+// Verifies that the reporting checkbox is still shown if the page is reloaded
+// while the interstitial is showing.
+IN_PROC_BROWSER_TEST_P(SafeBrowsingBlockingPageBrowserTest,
+                       ReloadWhileInterstitialShowing) {
+  // Start navigation to bad page (kEmptyPage), which will be blocked before it
+  // is committed.
+  const GURL url = SetupWarningAndNavigate();
+
+  // Checkbox should be showing.
+  EXPECT_EQ(VISIBLE, GetVisibility("extended-reporting-opt-in"));
+
+  WebContents* tab = browser()->tab_strip_model()->GetActiveWebContents();
+  ASSERT_TRUE(tab);
+  // Security indicator should be showing.
+  ExpectSecurityIndicatorDowngrade(tab, 0u);
+
+  // Check navigation entry state.
+  const NavigationController& controller = tab->GetController();
+  ASSERT_TRUE(controller.GetVisibleEntry());
+  EXPECT_EQ(url, controller.GetVisibleEntry()->GetURL());
+  ASSERT_TRUE(controller.GetPendingEntry());
+  EXPECT_EQ(url, controller.GetPendingEntry()->GetURL());
+
+  // "Reload" the tab.
+  SetupWarningAndNavigate();
+
+  // Checkbox should be showing.
+  EXPECT_EQ(VISIBLE, GetVisibility("extended-reporting-opt-in"));
+
+  // TODO(crbug.com/666172): Security indicator should be showing.
+  // Call |ExpectSecurityIndicatorDowngrade(tab, 0u);| here once the bug is
+  // fixed.
+
+  // Check navigation entry state.
+  ASSERT_TRUE(controller.GetVisibleEntry());
+  EXPECT_EQ(url, controller.GetVisibleEntry()->GetURL());
+  ASSERT_TRUE(controller.GetPendingEntry());
+  EXPECT_EQ(url, controller.GetPendingEntry()->GetURL());
+}
+
 IN_PROC_BROWSER_TEST_P(SafeBrowsingBlockingPageBrowserTest, LearnMore) {
   SetupWarningAndNavigate();
   EXPECT_TRUE(ClickAndWaitForDetach("learn-more-link"));
   AssertNoInterstitial(false);  // Assert the interstitial is gone
 
   // We are in the help page.
   EXPECT_EQ(
       GURL("https://support.google.com/chrome/answer/99020").GetWithEmptyPath(),
       browser()
           ->tab_strip_model()
@@ skipping 379 matching lines @@
 
 INSTANTIATE_TEST_CASE_P(
     SafeBrowsingBlockingPageIDNTestWithThreatType,
     SafeBrowsingBlockingPageIDNTest,
     testing::Combine(testing::Values(false, true),
                      testing::Values(SB_THREAT_TYPE_URL_MALWARE,
                                      SB_THREAT_TYPE_URL_PHISHING,
                                      SB_THREAT_TYPE_URL_UNWANTED)));
 
 }  // namespace safe_browsing