Tracing for NavigationHandle lifetime and state.

components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.h

 // Copyright (c) 2017 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 COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_SUBRESOURCE_FILTER_SAFE_BROWSING_ACTIVATION_THROTTLE_H_
 #define COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_SUBRESOURCE_FILTER_SAFE_BROWSING_ACTIVATION_THROTTLE_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 14 matching lines @@
   SubresourceFilterSafeBrowsingActivationThrottle(
       content::NavigationHandle* handle,
       scoped_refptr<safe_browsing::SafeBrowsingDatabaseManager>
           database_manager);
 
   ~SubresourceFilterSafeBrowsingActivationThrottle() override;
 
   // content::NavigationThrottle:
   content::NavigationThrottle::ThrottleCheckResult WillProcessResponse()
       override;
+  const char* GetNameForLogging() override;
 
   void OnCheckUrlResultOnUI(const GURL& url,
                             safe_browsing::SBThreatType threat_type,
                             safe_browsing::ThreatPatternType pattern_type);
 
  private:
   class SBDatabaseClient;
 
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
   std::unique_ptr<SBDatabaseClient, base::OnTaskRunnerDeleter> database_client_;
 
   DISALLOW_COPY_AND_ASSIGN(SubresourceFilterSafeBrowsingActivationThrottle);
 };
 
 }  // namespace subresource_filter
 
 #endif  // COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_SUBRESOURCE_FILTER_SAFE_BROWSING_ACTIVATION_THROTTLE_H_