PaymentHandler: Implement requestPermission().

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 cc19565cd3fa48873037c23e383055402241a568..5054e745e9563aaf9cd7123acf498ca375d0bbd9 100644
--- a/components/content_settings/core/browser/content_settings_registry.cc
+++ b/components/content_settings/core/browser/content_settings_registry.cc
@@ -266,6 +266,16 @@ void ContentSettingsRegistry::Init() {
                WebsiteSettingsRegistry::PLATFORM_ANDROID,
            ContentSettingsInfo::INHERIT_IF_LESS_PERMISSIVE);
 
+  Register(CONTENT_SETTINGS_TYPE_PAYMENT_HANDLER, "payment-handler",
+           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_IF_LESS_PERMISSIVE);
+
   Register(CONTENT_SETTINGS_TYPE_AUTOPLAY, "autoplay", CONTENT_SETTING_ALLOW,
            WebsiteSettingsInfo::UNSYNCABLE, WhitelistedSchemes(),
            ValidSettings(CONTENT_SETTING_ALLOW, CONTENT_SETTING_BLOCK),