Remove content::NotificationObserver dependency from most Prefs code.

chrome/browser/chromeos/preferences.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/chromeos/preferences.h"
 
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
 #include "base/i18n/time_formatting.h"
 #include "base/metrics/histogram.h"
@@ skipping 12 matching lines @@
 #include "chrome/browser/chromeos/system/drm_settings.h"
 #include "chrome/browser/chromeos/system/input_device_settings.h"
 #include "chrome/browser/chromeos/system/power_manager_settings.h"
 #include "chrome/browser/chromeos/system/statistics_provider.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_source.h"
 #include "googleurl/src/gurl.h"
 #include "ui/base/events/event_constants.h"
 #include "unicode/timezone.h"
 
 namespace chromeos {
 
 static const char kFallbackInputMethodLocale[] = "en-US";
 
 Preferences::Preferences()
     : prefs_(NULL),
@@ skipping 334 matching lines @@
 }
 
 void Preferences::InitUserPrefsForTesting(PrefService* prefs) {
   InitUserPrefs(prefs);
 }
 
 void Preferences::SetInputMethodListForTesting() {
   SetInputMethodList();
 }
 
-void Preferences::Observe(int type,
-                          const content::NotificationSource& source,
-                          const content::NotificationDetails& details) {
-  if (type == chrome::NOTIFICATION_PREF_CHANGED)
-    NotifyPrefChanged(content::Details<std::string>(details).ptr());
+void Preferences::OnPreferenceChanged(PrefServiceBase* service,
+                                      const std::string& pref_name) {
+  NotifyPrefChanged(&pref_name);
 }
 
 void Preferences::NotifyPrefChanged(const std::string* pref_name) {
   if (!pref_name || *pref_name == prefs::kTapToClickEnabled) {
     const bool enabled = tap_to_click_enabled_.GetValue();
     system::touchpad_settings::SetTapToClick(enabled);
     if (pref_name)
       UMA_HISTOGRAM_BOOLEAN("Touchpad.TapToClick.Changed", enabled);
     else
       UMA_HISTOGRAM_BOOLEAN("Touchpad.TapToClick.Started", enabled);
@@ skipping 340 matching lines @@
 
   input_method::AutoRepeatRate rate;
   rate.initial_delay_in_ms = xkb_auto_repeat_delay_pref_.GetValue();
   rate.repeat_interval_in_ms = xkb_auto_repeat_interval_pref_.GetValue();
   DCHECK(rate.initial_delay_in_ms > 0);
   DCHECK(rate.repeat_interval_in_ms > 0);
   input_method::XKeyboard::SetAutoRepeatRate(rate);
 }
 
 }  // namespace chromeos