Fix null-pointer crash.

chrome/browser/ssl/ssl_policy.cc

 // Copyright (c) 2006-2008 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/ssl/ssl_policy.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/base_switches.h"
 #include "base/command_line.h"
@@ skipping 68 matching lines @@
       OnFatalCertError(handler);
       break;
     default:
       NOTREACHED();
       handler->CancelRequest();
       break;
   }
 }
 
 void SSLPolicy::DidDisplayInsecureContent(NavigationEntry* entry) {
+  if (!entry)
+    return;
+
   // TODO(abarth): We don't actually need to break the whole origin here,
   //               but we can handle that in a later patch.
   DidRunInsecureContent(entry, entry->url().spec());
 }
 
 void SSLPolicy::DidRunInsecureContent(NavigationEntry* entry,
                                       const std::string& security_origin) {
   if (!entry)
     return;
 
@@ skipping 180 matching lines @@
     // mark the main frame's origin as broken too.
     MarkOriginAsBroken(info->main_frame_origin(), info->child_id());
   }
 }
 
 void SSLPolicy::UpdateStateForUnsafeContent(SSLRequestInfo* info) {
   // This request as a broken cert, which means its host is broken.
   backend_->MarkHostAsBroken(info->url().host(), info->child_id());
   UpdateStateForMixedContent(info);
 }