Tracing for NavigationHandle lifetime and state.

content/browser/frame_host/form_submission_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 CONTENT_BROWSER_FRAME_HOST_FORM_SUBMISSION_THROTTLE_H_
 #define CONTENT_BROWSER_FRAME_HOST_FORM_SUBMISSION_THROTTLE_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "content/public/browser/navigation_throttle.h"
 
 namespace content {
 class NavigationHandle;
 
 // A FormSubmissionThrottle is responsible for enforcing the 'form-action' CSP
 // directive, blocking requests which violate them.
 // It is enforcing it only if PlzNavigate is enabled. Blink is still enforcing
 // the 'form-action' directive on the renderer process.
 class CONTENT_EXPORT FormSubmissionThrottle : public NavigationThrottle {
  public:
   static std::unique_ptr<NavigationThrottle> MaybeCreateThrottleFor(
       NavigationHandle* handle);
 
   ~FormSubmissionThrottle() override;
 
   NavigationThrottle::ThrottleCheckResult WillStartRequest() override;
   NavigationThrottle::ThrottleCheckResult WillRedirectRequest() override;
+  const char* GetNameForLogging() override;
 
  private:
   explicit FormSubmissionThrottle(NavigationHandle* handle);
   NavigationThrottle::ThrottleCheckResult CheckContentSecurityPolicyFormAction(
       bool is_redirect);
 
   DISALLOW_COPY_AND_ASSIGN(FormSubmissionThrottle);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_FORM_SUBMISSION_THROTTLE_H_