Tracing for NavigationHandle lifetime and state.

components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle_unittest.cc

 // 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.
 
 #include "components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.h"
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
@@ skipping 71 matching lines @@
 
   // content::NavigationThrottle:
   content::NavigationThrottle::ThrottleCheckResult WillProcessResponse()
       override {
     content::WebContents* web_contents = navigation_handle()->GetWebContents();
     ContentSubresourceFilterDriverFactory* factory =
         ContentSubresourceFilterDriverFactory::FromWebContents(web_contents);
     factory->WillProcessResponse(navigation_handle());
     return content::NavigationThrottle::PROCEED;
   }
+  const char* GetNameForLogging() override {
+    return "TestForwardingNavigationThrottle";
+  }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestForwardingNavigationThrottle);
 };
 
 }  //  namespace
 
 class SubresourceFilterSafeBrowsingActivationThrottleTest
     : public content::RenderViewHostTestHarness,
       public content::WebContentsObserver {
@@ skipping 156 matching lines @@
                             0);
   tester().ExpectTotalCount(kNavigationChainSizeSubresourceFilterSuffix, 0);
 }
 
 // TODO(melandory): Once non-defering check in WillStart is implemented add one
 // more test that destroys the Navigation along with corresponding throttles
 // while the SB check is pending? (To be run by ASAN bots to ensure
 // no use-after-free.)
 
 }  // namespace subresource_filter