Fix interstitial ui crashing when open in new tab.

chrome/browser/ui/webui/interstitials/interstitial_ui.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 "chrome/browser/ui/webui/interstitials/interstitial_ui.h"
 
 #include "base/macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 200 matching lines @@
       threat_type = safe_browsing::SB_THREAT_TYPE_CLIENT_SIDE_PHISHING_URL;
     }
   }
   safe_browsing::SafeBrowsingBlockingPage::UnsafeResource resource;
   resource.url = request_url;
   resource.is_subresource = request_url != main_frame_url;
   resource.is_subframe = false;
   resource.threat_type = threat_type;
   resource.render_process_host_id =
       web_contents->GetRenderProcessHost()->GetID();
-  resource.render_frame_id = web_contents->GetFocusedFrame()->GetRoutingID();
+  resource.render_frame_id = web_contents->GetMainFrame()->GetRoutingID();
   resource.threat_source = safe_browsing::ThreatSource::LOCAL_PVER3;
 
   // Normally safebrowsing interstitial types which block the main page load
   // (SB_THREAT_TYPE_URL_MALWARE, SB_THREAT_TYPE_URL_PHISHING, and
   // SB_THREAT_TYPE_URL_UNWANTED on main-frame loads) would expect there to be a
   // pending navigation when the SafeBrowsingBlockingPage is created. This demo
   // creates a SafeBrowsingBlockingPage but does not actually show a real
   // interstitial. Instead it extracts the html and displays it manually, so the
   // parts which depend on the NavigationEntry are not hit.
   return safe_browsing::SafeBrowsingBlockingPage::CreateBlockingPage(
@@ skipping 107 matching lines @@
     html = interstitial_delegate.get()->GetHTMLContents();
   } else {
     html = ResourceBundle::GetSharedInstance()
                           .GetRawDataResource(IDR_SECURITY_INTERSTITIAL_UI_HTML)
                           .as_string();
   }
   scoped_refptr<base::RefCountedString> html_bytes = new base::RefCountedString;
   html_bytes->data().assign(html.begin(), html.end());
   callback.Run(html_bytes.get());
 }