Only Register() platform specific content settings types on different platforms

components/content_settings/core/browser/content_settings_registry.cc

 // Copyright 2015 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 "components/content_settings/core/browser/content_settings_registry.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/macros.h"
@@ skipping 106 matching lines @@
 
   // WARNING: The string names of the permissions passed in below are used to
   // generate preference names and should never be changed!
 
   Register(CONTENT_SETTINGS_TYPE_COOKIES, "cookies", CONTENT_SETTING_ALLOW,
            WebsiteSettingsInfo::SYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_SESSION_ONLY),
            WebsiteSettingsInfo::REQUESTING_DOMAIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::ALL_PLATFORMS,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_IMAGES, "images", CONTENT_SETTING_ALLOW,
            WebsiteSettingsInfo::SYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme,
                               kExtensionScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::TOP_LEVEL_DOMAIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_JAVASCRIPT, "javascript",
            CONTENT_SETTING_ALLOW, WebsiteSettingsInfo::SYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme,
                               kExtensionScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::TOP_LEVEL_DOMAIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_PLUGINS, "plugins",
            CONTENT_SETTING_DETECT_IMPORTANT_CONTENT,
            WebsiteSettingsInfo::SYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK,
                          CONTENT_SETTING_DETECT_IMPORTANT_CONTENT),
            WebsiteSettingsInfo::TOP_LEVEL_DOMAIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_POPUPS, "popups", CONTENT_SETTING_BLOCK,
            WebsiteSettingsInfo::SYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme,
                               kExtensionScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::TOP_LEVEL_DOMAIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::ALL_PLATFORMS,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_GEOLOCATION, "geolocation",
            CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_AND_TOP_LEVEL_ORIGIN_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_NOTIFICATIONS, "notifications",
            CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            // See also NotificationPermissionContext::DecidePermission which
            // implements additional incognito exceptions.
            ContentSettingsInfo::INHERIT_IN_INCOGNITO_EXCEPT_ALLOW);
 
   Register(CONTENT_SETTINGS_TYPE_FULLSCREEN, "fullscreen", CONTENT_SETTING_ASK,
            WebsiteSettingsInfo::SYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_AND_TOP_LEVEL_ORIGIN_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_MOUSELOCK, "mouselock", CONTENT_SETTING_ASK,
            WebsiteSettingsInfo::SYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::TOP_LEVEL_DOMAIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC, "media-stream-mic",
            CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA, "media-stream-camera",
            CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_PPAPI_BROKER, "ppapi-broker",
            CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_AUTOMATIC_DOWNLOADS, "automatic-downloads",
            CONTENT_SETTING_ASK, WebsiteSettingsInfo::SYNCABLE,
            WhitelistedSchemes(kChromeUIScheme, kChromeDevToolsScheme,
                               kExtensionScheme),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::TOP_LEVEL_DOMAIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_MIDI_SYSEX, "midi-sysex", CONTENT_SETTING_ASK,
            WebsiteSettingsInfo::SYNCABLE, WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_AND_TOP_LEVEL_ORIGIN_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_PUSH_MESSAGING, "push-messaging",
            CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_AND_TOP_LEVEL_ORIGIN_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO_EXCEPT_ALLOW);
 
-#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
   Register(CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER,
            "protected-media-identifier", CONTENT_SETTING_ASK,
            WebsiteSettingsInfo::UNSYNCABLE, WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK,
                          CONTENT_SETTING_ASK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_AND_TOP_LEVEL_ORIGIN_SCOPE,
+           WebsiteSettingsRegistry::PLATFORM_ANDROID |
+               WebsiteSettingsRegistry::PLATFORM_CHROMEOS,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
-#endif
 
   Register(CONTENT_SETTINGS_TYPE_DURABLE_STORAGE, "durable-storage",
            CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
-  Register(CONTENT_SETTINGS_TYPE_KEYGEN, "keygen",
-           CONTENT_SETTING_BLOCK, WebsiteSettingsInfo::SYNCABLE,
-           WhitelistedSchemes(),
+  Register(CONTENT_SETTINGS_TYPE_KEYGEN, "keygen", CONTENT_SETTING_BLOCK,
+           WebsiteSettingsInfo::SYNCABLE, WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC, "background-sync",
            CONTENT_SETTING_ALLOW, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
-  Register(CONTENT_SETTINGS_TYPE_AUTOPLAY, "autoplay",
-           CONTENT_SETTING_ALLOW, WebsiteSettingsInfo::UNSYNCABLE,
-           WhitelistedSchemes(),
+  Register(CONTENT_SETTINGS_TYPE_AUTOPLAY, "autoplay", CONTENT_SETTING_ALLOW,
+           WebsiteSettingsInfo::UNSYNCABLE, WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   // Content settings that aren't used to store any data. TODO(raymes): use a
   // different mechanism rather than content settings to represent these.
   // Since nothing is stored in them, there is no real point in them being a
   // content setting.
   Register(CONTENT_SETTINGS_TYPE_PROTOCOL_HANDLERS, "protocol-handler",
            CONTENT_SETTING_DEFAULT, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(), ValidSettings(),
            WebsiteSettingsInfo::TOP_LEVEL_DOMAIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_MIXEDSCRIPT, "mixed-script",
            CONTENT_SETTING_DEFAULT, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(), ValidSettings(),
            WebsiteSettingsInfo::TOP_LEVEL_DOMAIN_ONLY_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 
   Register(CONTENT_SETTINGS_TYPE_BLUETOOTH_GUARD, "bluetooth-guard",
            CONTENT_SETTING_ASK, WebsiteSettingsInfo::UNSYNCABLE,
            WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ASK, CONTENT_SETTING_BLOCK),
            WebsiteSettingsInfo::REQUESTING_ORIGIN_AND_TOP_LEVEL_ORIGIN_SCOPE,
+           WebsiteSettingsRegistry::DESKTOP |
+               WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IN_INCOGNITO);
 }
 
 void ContentSettingsRegistry::Register(
     ContentSettingsType type,
     const std::string& name,
     ContentSetting initial_default_value,
     WebsiteSettingsInfo::SyncStatus sync_status,
     const std::vector<std::string>& whitelisted_schemes,
     const std::set<ContentSetting>& valid_settings,
     WebsiteSettingsInfo::ScopingType scoping_type,
+    Platforms platforms,
     ContentSettingsInfo::IncognitoBehavior incognito_behavior) {
   // Ensure that nothing has been registered yet for the given type.
   DCHECK(!website_settings_registry_->Get(type));
   DCHECK(incognito_behavior
              != ContentSettingsInfo::INHERIT_IN_INCOGNITO_EXCEPT_ALLOW
          || ContainsKey(valid_settings, CONTENT_SETTING_ASK))
       << "If INHERIT_IN_INCOGNITO_EXCEPT_ALLOW is set, ASK must be listed as a "
          "valid setting.";
   std::unique_ptr<base::Value> default_value(
       new base::FundamentalValue(static_cast<int>(initial_default_value)));
   const WebsiteSettingsInfo* website_settings_info =
       website_settings_registry_->Register(
           type, name, std::move(default_value), sync_status,
-          WebsiteSettingsInfo::NOT_LOSSY, scoping_type,
+          WebsiteSettingsInfo::NOT_LOSSY, scoping_type, platforms,
           WebsiteSettingsInfo::INHERIT_IN_INCOGNITO);
+
+  // WebsiteSettingsInfo::Register() will return nullptr if content setting type
+  // is not used on current platform and don't need to be registered.

[raymes, 2016/05/30 00:35:58]

nit: is not used on the current platform and doesn't need to be registered.

[lshang, 2016/05/30 03:22:11]

Done.

+  if (!website_settings_info)
+    return;
+
   DCHECK(!ContainsKey(content_settings_info_, type));
   content_settings_info_[type] = base::WrapUnique(
       new ContentSettingsInfo(website_settings_info, whitelisted_schemes,
                               valid_settings, incognito_behavior));
 }
 
 }  // namespace content_settings