Tracing for NavigationHandle lifetime and state.

components/subresource_filter/content/browser/activation_state_computing_navigation_throttle.h

 // Copyright 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_FRAME_ACTIVATION_NAVIGATION_THROTTLE_H_
 #define COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_FRAME_ACTIVATION_NAVIGATION_THROTTLE_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 37 matching lines @@
   // Must be called at most once before WillProcessResponse is called on this
   // throttle. If it is never called, or it is called with a DISABLED state,
   // this object will never delay the navigation.
   void NotifyPageActivationWithRuleset(
       VerifiedRuleset::Handle* ruleset_handle,
       const ActivationState& page_activation_state);
 
   // content::NavigationThrottle:
   content::NavigationThrottle::ThrottleCheckResult WillProcessResponse()
       override;
+  const char* GetNameForLogging() override;
 
   // After the navigation is finished, the client may optionally choose to
   // continue using the DocumentSubresourceFilter that was used to compute the
   // activation state for this frame. The transfered filter can be cached and
   // used to calculate load policy for subframe navigations occuring in this
   // frame.
   std::unique_ptr<AsyncDocumentSubresourceFilter> ReleaseFilter();
 
   AsyncDocumentSubresourceFilter* filter() { return async_filter_.get(); }
 
@@ skipping 28 matching lines @@
 
   base::WeakPtrFactory<ActivationStateComputingNavigationThrottle>
       weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ActivationStateComputingNavigationThrottle);
 };
 
 }  // namespace subresource_filter
 
 #endif  // COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_FRAME_ACTIVATION_NAVIGATION_THROTTLE_H_