Cleanup: Simplify some extensions / content_settings Observer code by simply DCHECKING instead of u…

chrome/browser/content_settings/content_settings_policy_provider.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/content_settings/content_settings_policy_provider.h"
 
 #include <string>
 #include <vector>
 
 #include "base/json/json_reader.h"
@@ skipping 408 matching lines @@
   if (!prefs_)
     return;
   pref_change_registrar_.RemoveAll();
   prefs_ = NULL;
 }
 
 void PolicyProvider::Observe(int type,
                              const content::NotificationSource& source,
                              const content::NotificationDetails& details) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_EQ(chrome::NOTIFICATION_PREF_CHANGED, type);
+  DCHECK_EQ(content::Source<PrefService>(source).ptr(), prefs_);
 
-  if (type == chrome::NOTIFICATION_PREF_CHANGED) {
-    DCHECK_EQ(prefs_, content::Source<PrefService>(source).ptr());
-    std::string* name = content::Details<std::string>(details).ptr();
-    if (*name == prefs::kManagedDefaultCookiesSetting) {
-      UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_COOKIES);
-    } else if (*name == prefs::kManagedDefaultImagesSetting) {
-      UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_IMAGES);
-    } else if (*name == prefs::kManagedDefaultJavaScriptSetting) {
-      UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_JAVASCRIPT);
-    } else if (*name == prefs::kManagedDefaultPluginsSetting) {
-      UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_PLUGINS);
-    } else if (*name == prefs::kManagedDefaultPopupsSetting) {
-      UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_POPUPS);
-    } else if (*name == prefs::kManagedDefaultGeolocationSetting) {
-      UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_GEOLOCATION);
-    } else if (*name == prefs::kManagedDefaultNotificationsSetting) {
-      UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_NOTIFICATIONS);
-    } else if (*name == prefs::kManagedDefaultMediaStreamSetting) {
-      UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_MEDIASTREAM);
-    } else if (*name == prefs::kManagedAutoSelectCertificateForUrls ||
-        *name == prefs::kManagedCookiesAllowedForUrls ||
-        *name == prefs::kManagedCookiesBlockedForUrls ||
-        *name == prefs::kManagedCookiesSessionOnlyForUrls ||
-        *name == prefs::kManagedImagesAllowedForUrls ||
-        *name == prefs::kManagedImagesBlockedForUrls ||
-        *name == prefs::kManagedJavaScriptAllowedForUrls ||
-        *name == prefs::kManagedJavaScriptBlockedForUrls ||
-        *name == prefs::kManagedPluginsAllowedForUrls ||
-        *name == prefs::kManagedPluginsBlockedForUrls ||
-        *name == prefs::kManagedPopupsAllowedForUrls ||
-        *name == prefs::kManagedPopupsBlockedForUrls ||
-        *name == prefs::kManagedNotificationsAllowedForUrls ||
-        *name == prefs::kManagedNotificationsBlockedForUrls) {
-      ReadManagedContentSettings(true);
-      ReadManagedDefaultSettings();
-    }
+  const std::string& name = *content::Details<std::string>(details).ptr();
+  if (name == prefs::kManagedDefaultCookiesSetting) {
+    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_COOKIES);
+  } else if (name == prefs::kManagedDefaultImagesSetting) {
+    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_IMAGES);
+  } else if (name == prefs::kManagedDefaultJavaScriptSetting) {
+    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_JAVASCRIPT);
+  } else if (name == prefs::kManagedDefaultPluginsSetting) {
+    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_PLUGINS);
+  } else if (name == prefs::kManagedDefaultPopupsSetting) {
+    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_POPUPS);
+  } else if (name == prefs::kManagedDefaultGeolocationSetting) {
+    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_GEOLOCATION);
+  } else if (name == prefs::kManagedDefaultNotificationsSetting) {
+    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_NOTIFICATIONS);
+  } else if (name == prefs::kManagedDefaultMediaStreamSetting) {
+    UpdateManagedDefaultSetting(CONTENT_SETTINGS_TYPE_MEDIASTREAM);
+  } else if (name == prefs::kManagedAutoSelectCertificateForUrls ||
+             name == prefs::kManagedCookiesAllowedForUrls ||
+             name == prefs::kManagedCookiesBlockedForUrls ||
+             name == prefs::kManagedCookiesSessionOnlyForUrls ||
+             name == prefs::kManagedImagesAllowedForUrls ||
+             name == prefs::kManagedImagesBlockedForUrls ||
+             name == prefs::kManagedJavaScriptAllowedForUrls ||
+             name == prefs::kManagedJavaScriptBlockedForUrls ||
+             name == prefs::kManagedPluginsAllowedForUrls ||
+             name == prefs::kManagedPluginsBlockedForUrls ||
+             name == prefs::kManagedPopupsAllowedForUrls ||
+             name == prefs::kManagedPopupsBlockedForUrls ||
+             name == prefs::kManagedNotificationsAllowedForUrls ||
+             name == prefs::kManagedNotificationsBlockedForUrls) {
+    ReadManagedContentSettings(true);
+    ReadManagedDefaultSettings();
   } else {
-    NOTREACHED() << "Unexpected notification";
+    NOTREACHED();
     return;
   }
   NotifyObservers(ContentSettingsPattern(),
                   ContentSettingsPattern(),
                   CONTENT_SETTINGS_TYPE_DEFAULT,
                   std::string());
 }
 
 }  // namespace content_settings