Use DCHECKs when observing only a single notification.

chrome/browser/plugins/plugin_status_pref_setter.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/plugins/plugin_status_pref_setter.h"
 
 #include "base/bind.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/pepper_flash_settings_manager.h"
 #include "chrome/browser/plugins/plugin_data_remover_helper.h"
@@ skipping 26 matching lines @@
   profile_ = profile;
   registrar_.Add(this, chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED,
                  content::Source<Profile>(profile));
   StartUpdate();
 }
 
 void PluginStatusPrefSetter::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
-  if (type == chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED) {
-    StartUpdate();
-  } else {
-    NOTREACHED();
-  }
+  DCHECK_EQ(chrome::NOTIFICATION_PLUGIN_ENABLE_STATUS_CHANGED, type);
+  StartUpdate();
 }
 
 void PluginStatusPrefSetter::StartUpdate() {
   PluginService::GetInstance()->GetPlugins(
       base::Bind(&PluginStatusPrefSetter::GotPlugins, factory_.GetWeakPtr(),
                  PluginPrefs::GetForProfile(profile_)));
 }
 
 void PluginStatusPrefSetter::GotPlugins(
     scoped_refptr<PluginPrefs> plugin_prefs,
     const std::vector<content::WebPluginInfo>& plugins) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   // Set the values on the PrefService instead of through the PrefMembers to
   // notify observers if they changed.
   profile_->GetPrefs()->SetBoolean(
       clear_plugin_lso_data_enabled_.GetPrefName().c_str(),
       PluginDataRemoverHelper::IsSupported(plugin_prefs.get()));
   profile_->GetPrefs()->SetBoolean(
       pepper_flash_settings_enabled_.GetPrefName().c_str(),
       PepperFlashSettingsManager::IsPepperFlashInUse(plugin_prefs.get(), NULL));
 }