Add several new TRACE call and UMA metrics for GetProfile()

chrome/browser/prefs/chrome_pref_service_factory.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/prefs/chrome_pref_service_factory.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/metrics/field_trial.h"
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/prefs/default_pref_store.h"
 #include "base/prefs/json_pref_store.h"
 #include "base/prefs/pref_filter.h"
 #include "base/prefs/pref_notifier_impl.h"
 #include "base/prefs/pref_registry.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/pref_store.h"
 #include "base/prefs/pref_value_store.h"
 #include "base/threading/sequenced_worker_pool.h"
@@ skipping 469 matching lines @@
 scoped_ptr<PrefServiceSyncable> CreateProfilePrefs(
     const base::FilePath& profile_path,
     base::SequencedTaskRunner* pref_io_task_runner,
     TrackedPreferenceValidationDelegate* validation_delegate,
     policy::PolicyService* policy_service,
     SupervisedUserSettingsService* supervised_user_settings,
     const scoped_refptr<PrefStore>& extension_prefs,
     const scoped_refptr<user_prefs::PrefRegistrySyncable>& pref_registry,
     bool async) {
   TRACE_EVENT0("browser", "chrome_prefs::CreateProfilePrefs");
+  SCOPED_UMA_HISTOGRAM_TIMER("PrefService.CreateProfilePrefsTime");
 
   // A StartSyncFlare used to kick sync early in case of a reset event. This is
   // done since sync may bring back the user's server value post-reset which
   // could potentially cause a "settings flash" between the factory default and
   // the re-instantiated server value. Starting sync ASAP minimizes the window
   // before the server value is re-instantiated (this window can otherwise be
   // as long as 10 seconds by default).
   const base::Closure start_sync_flare_for_prefs =
       base::Bind(sync_start_util::GetFlareForSyncableService(profile_path),
                  syncer::PREFERENCES);
@@ skipping 54 matching lines @@
 
 void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   ProfilePrefStoreManager::RegisterProfilePrefs(registry);
 }
 
 void RegisterPrefs(PrefRegistrySimple* registry) {
   ProfilePrefStoreManager::RegisterPrefs(registry);
 }
 
 }  // namespace chrome_prefs