Add test to check for crash caused by stale WebContents in chrome://interstitials

chrome/browser/ui/webui/interstitials/interstitial_ui_browsertest.cc

 // Copyright 2014 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.
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/devtools/devtools_window_testing.h"
 #include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/web_contents.h"
 
 class InterstitialUITest : public InProcessBrowserTest {
  public:
    InterstitialUITest() {}
    ~InterstitialUITest() override {}
 
@@ skipping 57 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(InterstitialUITest, CaptivePortalInterstitial) {
   TestInterstitial(GURL("chrome://interstitials/captiveportal"),
                    "Connect to network");
 }
 
 IN_PROC_BROWSER_TEST_F(InterstitialUITest, CaptivePortalInterstitialWifi) {
   TestInterstitial(GURL("chrome://interstitials/captiveportal?is_wifi=1"),
                    "Connect to Wi-Fi");
 }
+
+// Checks that the interstitial page uses correct web contents. If not, closing
+// the tab might result in a freed web contents pointer and cause a crash.
+// See https://crbug.com/611706 for details.
+IN_PROC_BROWSER_TEST_F(InterstitialUITest, UseCorrectWebContents) {
+  int current_tab = browser()->tab_strip_model()->active_index();
+  ui_test_utils::NavigateToURL(browser(), GURL("chrome://interstitials/ssl"));
+
+  // Duplicate the tab and close it.
+  chrome::DuplicateTab(browser());
+  EXPECT_NE(current_tab, browser()->tab_strip_model()->active_index());
+  chrome::CloseTab(browser());
+  EXPECT_EQ(current_tab, browser()->tab_strip_model()->active_index());
+
+  // Reloading the page shouldn't cause a crash.
+  chrome::Reload(browser(), WindowOpenDisposition::CURRENT_TAB);
+}