Tracing for NavigationHandle lifetime and state.

chrome/browser/chromeos/login/signin/merge_session_navigation_throttle.cc

 // Copyright 2015 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/chromeos/login/signin/merge_session_navigation_throttle.h"
 
 #include "chrome/browser/chromeos/login/signin/merge_session_load_page.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_handle.h"
 
@@ skipping 27 matching lines @@
   // The MergeSessionLoadPage will be deleted by the interstitial page once it
   // is closed.
   (new chromeos::MergeSessionLoadPage(
        navigation_handle()->GetWebContents(), navigation_handle()->GetURL(),
        base::Bind(&MergeSessionNavigationThrottle::OnBlockingPageComplete,
                   weak_factory_.GetWeakPtr())))
       ->Show();
   return content::NavigationThrottle::DEFER;
 }
 
+const char* MergeSessionNavigationThrottle::GetNameForLogging() {
+  return "MergeSessionNavigationThrottle";
+}
+
 void MergeSessionNavigationThrottle::OnBlockingPageComplete() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   navigation_handle()->Resume();
 }