Remove the unmaintained performance monitor.

chrome/browser/sessions/session_restore.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/sessions/session_restore.h"
 
 #include <algorithm>
 #include <list>
 #include <set>
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/metrics/histogram.h"
 #include "base/run_loop.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/task/cancelable_task_tracker.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
-#include "chrome/browser/performance_monitor/startup_timer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/search.h"
 #include "chrome/browser/sessions/session_service.h"
 #include "chrome/browser/sessions/session_service_factory.h"
 #include "chrome/browser/sessions/session_types.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/browser/ui/browser_tabrestore.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
@@ skipping 417 matching lines @@
   ++tab_count_;
 }
 
 void TabLoader::HandleTabClosedOrLoaded(NavigationController* tab) {
   RemoveTab(tab);
   if (loading_)
     LoadNextTab();
   if (tabs_loading_.empty() && tabs_to_load_.empty()) {
     base::TimeDelta time_to_load =
         base::TimeTicks::Now() - restore_started_;
-    performance_monitor::StartupTimer::SetElapsedSessionRestoreTime(
-        time_to_load);
     UMA_HISTOGRAM_CUSTOM_TIMES(
         "SessionRestore.AllTabsLoaded",
         time_to_load,
         base::TimeDelta::FromMilliseconds(10),
         base::TimeDelta::FromSeconds(100),
         100);
     // Record a time for the number of tabs, to help track down contention.
     std::string time_for_count =
         base::StringPrintf("SessionRestore.AllTabsLoaded_%d", tab_count_);
     base::HistogramBase* counter_for_count =
@@ skipping 816 matching lines @@
   if (!active_session_restorers)
     return false;
   for (std::set<SessionRestoreImpl*>::const_iterator it =
            active_session_restorers->begin();
        it != active_session_restorers->end(); ++it) {
     if ((*it)->synchronous())
       return true;
   }
   return false;
 }