Record time to navigation/tab-closed after HTTP-bad warning

chrome/browser/ssl/security_state_tab_helper.h

 // Copyright 2015 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.
 
 #ifndef CHROME_BROWSER_SSL_SECURITY_STATE_TAB_HELPER_H_
 #define CHROME_BROWSER_SSL_SECURITY_STATE_TAB_HELPER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 18 matching lines @@
 
   // See security_state::GetSecurityInfo.
   void GetSecurityInfo(
       security_state::SecurityInfo* result) const;
 
   // Called when the NavigationEntry's SSLStatus or other security
   // information changes.
   void VisibleSecurityStateChanged();
 
   // content::WebContentsObserver:
+  void DidStartNavigation(
+      content::NavigationHandle* navigation_handle) override;
   void DidFinishNavigation(
       content::NavigationHandle* navigation_handle) override;
+  void WebContentsDestroyed() override;
 
  private:
   explicit SecurityStateTabHelper(content::WebContents* web_contents);
   friend class content::WebContentsUserData<SecurityStateTabHelper>;
 
   bool UsedPolicyInstalledCertificate() const;
   security_state::MaliciousContentStatus GetMaliciousContentStatus() const;
   std::unique_ptr<security_state::VisibleSecurityState>
   GetVisibleSecurityState() const;
 
   // True if a console message has been logged about an omnibox warning that
   // will be shown in future versions of Chrome for insecure HTTP pages. This
   // message should only be logged once per main-frame navigation.
   bool logged_http_warning_on_current_navigation_;
 
+  // The time that a console or omnibox warning was shown for insecure
+  // HTTP pages that contain password or credit card fields. This is set
+  // at most once per main-frame navigation (the first time that an HTTP
+  // warning triggers on that navigation) and is used for UMA
+  // histogramming.
+  base::Time time_of_http_warning_on_current_navigation_;
+
   DISALLOW_COPY_AND_ASSIGN(SecurityStateTabHelper);
 };
 
 #endif  // CHROME_BROWSER_SSL_SECURITY_STATE_TAB_HELPER_H_