Adds the setting to limitl the subresource filter activation.

components/content_settings/core/browser/content_settings_registry.cc

Index: components/content_settings/core/browser/content_settings_registry.cc
diff --git a/components/content_settings/core/browser/content_settings_registry.cc b/components/content_settings/core/browser/content_settings_registry.cc
index 917c6cc33486af172cb30fdeb963042d1725530a..2eff2dab7e85b704c4ed0f75b40d8d9dc7296e93 100644
--- a/components/content_settings/core/browser/content_settings_registry.cc
+++ b/components/content_settings/core/browser/content_settings_registry.cc
@@ -273,6 +273,15 @@ void ContentSettingsRegistry::Init() {
                WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IF_LESS_PERMISSIVE);
 
+  Register(CONTENT_SETTINGS_TYPE_SUBRESOURCE_FILTER, "subresource-filter",
+           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_IF_LESS_PERMISSIVE);
+
   // 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