Fix a race condition in preference metric reporting.

chrome/browser/profiles/profile_impl.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/profiles/profile_impl.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
@@ skipping 42 matching lines @@
 #include "chrome/browser/net/predictor.h"
 #include "chrome/browser/net/pref_proxy_config_tracker.h"
 #include "chrome/browser/net/proxy_service_factory.h"
 #include "chrome/browser/net/ssl_config_service_manager.h"
 #include "chrome/browser/plugins/chrome_plugin_service_filter.h"
 #include "chrome/browser/plugins/plugin_prefs.h"
 #include "chrome/browser/policy/profile_policy_connector.h"
 #include "chrome/browser/policy/profile_policy_connector_factory.h"
 #include "chrome/browser/prefs/browser_prefs.h"
 #include "chrome/browser/prefs/chrome_pref_service_factory.h"
+#include "chrome/browser/prefs/pref_hash_calculator.h"
+#include "chrome/browser/prefs/pref_hash_store_impl.h"
 #include "chrome/browser/prefs/pref_service_syncable.h"
 #include "chrome/browser/prerender/prerender_manager_factory.h"
 #include "chrome/browser/profiles/bookmark_model_loaded_observer.h"
 #include "chrome/browser/profiles/chrome_version_service.h"
 #include "chrome/browser/profiles/gaia_info_update_service_factory.h"
 #include "chrome/browser/profiles/profile_destroyer.h"
 #include "chrome/browser/profiles/profile_info_cache.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/search_engines/template_url_fetcher.h"
 #include "chrome/browser/sessions/session_service_factory.h"
@@ skipping 12 matching lines @@
 #include "components/user_prefs/pref_registry_syncable.h"
 #include "components/user_prefs/user_prefs.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/dom_storage_context.h"
 #include "content/public/browser/host_zoom_map.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/common/content_constants.h"
+#include "grit/browser_resources.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 #if defined(ENABLE_CONFIGURATION_POLICY)
 #include "chrome/browser/policy/browser_policy_connector.h"
 #include "chrome/browser/policy/schema_registry_service.h"
 #include "chrome/browser/policy/schema_registry_service_factory.h"
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_chromeos.h"
 #include "chrome/browser/chromeos/policy/user_cloud_policy_manager_factory_chromeos.h"
 #else
 #include "chrome/browser/policy/cloud/user_cloud_policy_manager.h"
 #include "chrome/browser/policy/cloud/user_cloud_policy_manager_factory.h"
 #endif
 #endif
 
 #if defined(ENABLE_MANAGED_USERS)
 #include "chrome/browser/managed_mode/managed_user_settings_service.h"
 #include "chrome/browser/managed_mode/managed_user_settings_service_factory.h"
 #endif
 
 #if defined(OS_WIN)
 #include "chrome/browser/profiles/file_path_verifier_win.h"
 #include "chrome/installer/util/install_util.h"
+#if defined(ENABLE_RLZ)
+#include "rlz/lib/machine_id.h"
+#endif
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/locale_change_guard.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/preferences.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #endif
 
 using base::Time;
@@ skipping 119 matching lines @@
 #if defined(OS_WIN)
   // Only do prefs file verification on Windows.
   const int kVerifyPrefsFileDelaySeconds = 60;
   BrowserThread::GetBlockingPool()->PostDelayedTask(
         FROM_HERE,
         base::Bind(&VerifyPreferencesFile, prefs_file),
         base::TimeDelta::FromSeconds(kVerifyPrefsFileDelaySeconds));
 #endif
 }
 
+scoped_ptr<PrefHashStore> GetPrefHashStore(Profile* profile) {
+  std::string seed = ResourceBundle::GetSharedInstance().GetRawDataResource(
+      IDR_PREF_HASH_SEED_BIN).as_string();
+  std::string device_id;
+
+#if defined(OS_WIN) && defined(ENABLE_RLZ)
+  // This is used by
+  // chrome/browser/extensions/api/music_manager_private/device_id_win.cc
+  // but that API is private and other platforms are not available
+  // synchronously.
+  // As part of improving pref metrics on other platforms we may want to find
+  // ways to defer preference loading until the device ID can be used.
+  rlz_lib::GetMachineId(&device_id);
+#endif
+
+  return scoped_ptr<PrefHashStore>(new PrefHashStoreImpl(
+      PrefHashCalculator(seed, device_id),
+      g_browser_process->local_state(),
+      profile->GetPath().AsUTF8Unsafe()));
+}
+
 }  // namespace
 
 // static
 Profile* Profile::CreateProfile(const base::FilePath& path,
                                 Delegate* delegate,
                                 CreateMode create_mode) {
   TRACE_EVENT0("browser", "Profile::CreateProfile")
   // Get sequenced task runner for making sure that file operations of
   // this profile (defined by |path|) are executed in expected order
   // (what was previously assured by the FILE thread).
@@ skipping 176 matching lines @@
   {
     // On startup, preference loading is always synchronous so a scoped timer
     // will work here.
     startup_metric_utils::ScopedSlowStartupUMA
         scoped_timer("Startup.SlowStartupPreferenceLoading");
     prefs_.reset(chrome_prefs::CreateProfilePrefs(
         GetPrefFilePath(),
         sequenced_task_runner,
         profile_policy_connector_->policy_service(),
         managed_user_settings,
+        GetPrefHashStore(this),
         new ExtensionPrefStore(
             ExtensionPrefValueMapFactory::GetForBrowserContext(this), false),
         pref_registry_,
         async_prefs));
     // Register on BrowserContext.
     user_prefs::UserPrefs::Set(this, prefs_.get());
   }
 
   startup_metric_utils::ScopedSlowStartupUMA
       scoped_timer("Startup.SlowStartupFinalProfileInit");
@@ skipping 776 matching lines @@
 PrefProxyConfigTracker* ProfileImpl::CreateProxyConfigTracker() {
 #if defined(OS_CHROMEOS)
   if (chromeos::ProfileHelper::IsSigninProfile(this)) {
     return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
         g_browser_process->local_state());
   }
 #endif  // defined(OS_CHROMEOS)
   return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfProfile(
       GetPrefs(), g_browser_process->local_state());
 }