Update to Chromium revision 614d31da (#423768)

- Fix PDF extension loading after showing the plugin placeholder (issue #2020)

libcef/browser/permissions/permission_util.cc

@@ -37,6 +37,8 @@ ContentSettingsType PermissionTypeToContentSetting(PermissionType permission) {
       return CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA;
     case PermissionType::BACKGROUND_SYNC:
       return CONTENT_SETTINGS_TYPE_BACKGROUND_SYNC;
+    case PermissionType::FLASH:
+      return CONTENT_SETTINGS_TYPE_PLUGINS;
     case PermissionType::NUM:
       // This will hit the NOTREACHED below.
       break;