PaymentHandler: Implement requestPermission().

chrome/browser/permissions/permission_manager.cc

Index: chrome/browser/permissions/permission_manager.cc
diff --git a/chrome/browser/permissions/permission_manager.cc b/chrome/browser/permissions/permission_manager.cc
index 5f205178591939e9455d83bf4ca505034c7557e6..d06905f727eebb0444d2c491eb435e6f2741f22d 100644
--- a/chrome/browser/permissions/permission_manager.cc
+++ b/chrome/browser/permissions/permission_manager.cc
@@ -16,6 +16,7 @@
 #include "chrome/browser/media/midi_sysex_permission_context.h"
 #include "chrome/browser/media/webrtc/media_stream_device_permission_context.h"
 #include "chrome/browser/notifications/notification_permission_context.h"
+#include "chrome/browser/payments/payment_handler_permission_context.h"
 #include "chrome/browser/permissions/permission_context_base.h"
 #include "chrome/browser/permissions/permission_manager_factory.h"
 #include "chrome/browser/permissions/permission_request_id.h"
@@ -107,6 +108,8 @@ ContentSettingsType PermissionTypeToContentSetting(PermissionType permission) {
       return CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC;
     case PermissionType::FLASH:
       return CONTENT_SETTINGS_TYPE_PLUGINS;
+    case PermissionType::PAYMENT_HANDLER:
+      return CONTENT_SETTINGS_TYPE_PAYMENT_HANDLER;
     case PermissionType::NUM:
       // This will hit the NOTREACHED below.
       break;
@@ -243,6 +246,8 @@ PermissionManager::PermissionManager(Profile* profile)
           profile, CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA);
   permission_contexts_[CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC] =
       base::MakeUnique<BackgroundSyncPermissionContext>(profile);
+  permission_contexts_[CONTENT_SETTINGS_TYPE_PAYMENT_HANDLER] =
+      base::MakeUnique<payments::PaymentHandlerPermissionContext>(profile);
 #if BUILDFLAG(ENABLE_PLUGINS)
   permission_contexts_[CONTENT_SETTINGS_TYPE_PLUGINS] =
       base::MakeUnique<FlashPermissionContext>(profile);