Record the number of tabs in a session restore in SampledProfile

chrome/browser/chrome_browser_main_posix.cc

 // Copyright (c) 2012 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/chrome_browser_main_posix.h"
 
 #include <errno.h>
 #include <limits.h>
 #include <pthread.h>
 #include <signal.h>
@@ skipping 78 matching lines @@
 class ExitHandler {
  public:
   // Invokes exit when appropriate.
   static void ExitWhenPossibleOnUIThread();
 
  private:
   ExitHandler();
   ~ExitHandler();
 
   // Called when a session restore has finished.
-  void OnSessionRestoreDone();
+  void OnSessionRestoreDone(int num_tabs_restored);
 
   // Does the appropriate call to Exit.
   static void Exit();
 
   // Points to the on-session-restored callback that was registered with
   // SessionRestore's callback list. When objects of this class are destroyed,
   // the subscription object's destructor will automatically unregister the
   // callback in SessionRestore, so that the callback list does not contain any
   // obsolete callbacks.
   SessionRestore::CallbackSubscription
@@ skipping 16 matching lines @@
 ExitHandler::ExitHandler() {
   on_session_restored_callback_subscription_ =
       SessionRestore::RegisterOnSessionRestoredCallback(
           base::Bind(&ExitHandler::OnSessionRestoreDone,
                      base::Unretained(this)));
 }
 
 ExitHandler::~ExitHandler() {
 }
 
-void ExitHandler::OnSessionRestoreDone() {
+void ExitHandler::OnSessionRestoreDone(int /* num_tabs */) {
   if (!SessionRestore::IsRestoringSynchronously()) {
     // At this point the message loop may not be running (meaning we haven't
     // gotten through browser startup, but are close). Post the task to at which
     // point the message loop is running.
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                             base::Bind(&ExitHandler::Exit));
     delete this;
   }
 }
 
@@ skipping 169 matching lines @@
   // Not called on Mac because we load the locale files differently.
   NOTREACHED();
 #elif defined(USE_AURA)
   // TODO(port): We may want a views based message dialog here eventually, but
   // for now, crash.
   NOTREACHED();
 #else
 #error "Need MessageBox implementation."
 #endif
 }