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

chrome/browser/prefs/browser_prefs.cc

 // Copyright 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/browser_prefs.h"
 
 #include <string>
 
-#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/trace_event/trace_event.h"
 #include "chrome/browser/about_flags.h"
 #include "chrome/browser/accessibility/invert_bubble_prefs.h"
 #include "chrome/browser/autocomplete/zero_suggest_provider.h"
 #include "chrome/browser/browser_process_impl.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/chrome_content_browser_client.h"
@@ skipping 352 matching lines @@
 
   // Preferences registered only for migration (clearing or moving to a new key)
   // go here.
 #if !defined(OS_ANDROID)
   registry->RegisterDictionaryPref(kLegacyProfileResetPromptMemento);
 #endif  // !defined(OS_ANDROID)
 }
 
 // Register prefs applicable to all profiles.
 void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
-  TRACE_EVENT0("browser", "chrome::RegisterUserPrefs");
+  TRACE_EVENT0("browser", "chrome::RegisterProfilePrefs");
+  SCOPED_UMA_HISTOGRAM_TIMER("Settings.RegisterProfilePrefsTime");
   // User prefs. Please keep this list alphabetized.
   autofill::AutofillManager::RegisterProfilePrefs(registry);
   bookmarks::RegisterProfilePrefs(registry);
   sync_driver::SyncPrefs::RegisterProfilePrefs(registry);
   ChromeContentBrowserClient::RegisterProfilePrefs(registry);
   ChromeVersionService::RegisterProfilePrefs(registry);
   chrome_browser_net::HttpServerPropertiesManagerFactory::RegisterProfilePrefs(
       registry);
   chrome_browser_net::Predictor::RegisterProfilePrefs(registry);
   chrome_browser_net::RegisterPredictionOptionsProfilePrefs(registry);
@@ skipping 280 matching lines @@
       host_zoom_dictionary, false /* sanitize_partition_host_zoom_levels */);
 
   // We're done migrating the profile per-host zoom level values, so we clear
   // them all.
   DictionaryPrefUpdate host_zoom_dictionary_update(
       prefs, prefs::kPerHostZoomLevelsDeprecated);
   host_zoom_dictionary_update->Clear();
 }
 
 }  // namespace chrome