Stop suppressing generation of bindings with Promise.

tools/dom/dom.json

 {
   "ANGLEInstancedArrays": {
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         "support_level": "untriaged"
       },
       "drawArraysInstancedANGLE": {
         "support_level": "untriaged"
       },
       "drawElementsInstancedANGLE": {
@@ skipping 895 matching lines @@
         "support_level": "untriaged"
       }
     },
     "support_level": "untriaged"
   },
   "Cache": {
     "members": {},
     "support_level": "untriaged"
   },
   "CacheStorage": {
-    "members": {},
+    "members": {
+      "create": {
+        "support_level": "untriaged"
+      },
+      "delete": {
+        "support_level": "untriaged"
+      },
+      "get": {
+        "support_level": "untriaged"
+      },
+      "has": {
+        "support_level": "untriaged"
+      },
+      "keys": {
+        "support_level": "untriaged"
+      }
+    },
     "support_level": "untriaged"
   },
   "Canvas2DContextAttributes": {
     "comment": "http://wiki.whatwg.org/wiki/CanvasOpaque#Suggested_IDL",
     "members": {
       "alpha": {},
       "storage": {
         "support_level": "untriaged"
       }
     },
@@ skipping 549 matching lines @@
       "id": {
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       "name": {
         "support_level": "untriaged"
       }
     },
     "support_level": "untriaged"
   },
   "CredentialsContainer": {
-    "members": {},
+    "members": {
+      "notifyFailedSignIn": {
+        "support_level": "untriaged"
+      },
+      "notifySignedIn": {
+        "support_level": "untriaged"
+      },
+      "notifySignedOut": {
+        "support_level": "untriaged"
+      },
+      "request": {
+        "support_level": "untriaged"
+      }
+    },
     "support_level": "untriaged"
   },
   "Crypto": {
     "comment": "http://www.w3.org/TR/WebCryptoAPI/",
     "members": {
       "getRandomValues": {},
       "subtle": {
         "support_level": "untriaged"
       }
     },
@@ skipping 2059 matching lines @@
   "FederatedCredential": {
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       "FederatedCredential": {},
       "federation": {
         "support_level": "untriaged"
       }
     },
     "support_level": "untriaged"
   },
   "FetchBodyStream": {
-    "members": {},
+    "members": {
+      "asArrayBuffer": {
+        "support_level": "untriaged"
+      },
+      "asBlob": {
+        "support_level": "untriaged"
+      },
+      "asJSON": {
+        "support_level": "untriaged"
+      },
+      "asText": {
+        "support_level": "untriaged"
+      }
+    },
     "support_level": "untriaged"
   },
   "FetchEvent": {
     "members": {
       "isReload": {
         "support_level": "untriaged"
       },
       "request": {
         "support_level": "untriaged"
       },
@@ skipping 214 matching lines @@
       "FontFace": {},
       "family": {
         "support_level": "untriaged"
       },
       "featureSettings": {
         "support_level": "untriaged"
       },
       "load": {
         "support_level": "untriaged"
       },
+      "loaded": {
+        "support_level": "untriaged"
+      },
       "status": {
         "support_level": "untriaged"
       },
       "stretch": {
         "support_level": "untriaged"
       },
       "style": {
         "support_level": "untriaged"
       },
       "unicodeRange": {
@@ skipping 134 matching lines @@
   },
   "GamepadList": {
     "comment": "https://dvcs.w3.org/hg/gamepad/raw-file/default/gamepad.html",
     "members": {
       "item": {},
       "length": {}
     },
     "support_level": "experimental"
   },
   "Geofencing": {
-    "members": {},
+    "members": {
+      "getRegisteredRegions": {
+        "support_level": "untriaged"
+      },
+      "registerRegion": {
+        "support_level": "untriaged"
+      },
+      "unregisterRegion": {
+        "support_level": "untriaged"
+      }
+    },
     "support_level": "untriaged"
   },
   "GeofencingRegion": {
     "members": {
       "id": {
         "support_level": "untriaged"
       }
     },
     "support_level": "untriaged"
   },
@@ skipping 3186 matching lines @@
       },
       "initData": {}
     },
     "support_level": "experimental"
   },
   "MediaKeySession": {
     "comment": "https://dvcs.w3.org/hg/html-media/raw-file/eme-v0.1/encrypted-media/encrypted-media.html#dom-mediakeysession",
     "members": {
       "addEventListener": {},
       "close": {},
+      "closed": {
+        "support_level": "untriaged"
+      },
       "dispatchEvent": {},
       "error": {},
       "keySystem": {},
       "onkeyadded": {
         "support_level": "untriaged"
       },
       "onkeyerror": {
         "support_level": "untriaged"
       },
       "onkeymessage": {
         "support_level": "untriaged"
       },
       "onwebkitkeyadded": {},
       "onwebkitkeyerror": {},
       "onwebkitkeymessage": {},
       "release": {
         "support_level": "untriaged"
       },
       "removeEventListener": {},
       "sessionId": {},
       "update": {}
     },
     "support_level": "experimental"
   },
   "MediaKeys": {
     "comment": "https://dvcs.w3.org/hg/html-media/raw-file/eme-v0.1/encrypted-media/encrypted-media.html",
     "members": {
       "MediaKeys": {},
+      "create": {
+        "support_level": "untriaged"
+      },
       "createSession": {},
       "isTypeSupported": {
         "support_level": "untriaged"
       },
       "keySystem": {}
     },
     "support_level": "experimental"
   },
   "MediaList": {
     "comment": "http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSMediaRule",
@@ skipping 375 matching lines @@
         "support_level": "experimental"
       },
       "geofencing": {
         "support_level": "untriaged"
       },
       "geolocation": {
         "comment": "http://dev.w3.org/geo/api/spec-source.html#navi-geo",
         "dart_action": "unstable",
         "support_level": "stable"
       },
+      "getBattery": {
+        "support_level": "untriaged"
+      },
       "getGamepads": {
         "support_level": "untriaged"
       },
       "getMediaDevices": {
         "support_level": "untriaged"
       },
       "getStorageUpdates": {
         "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/timers.html#navigatorstorageutils",
         "support_level": "experimental"
       },
@@ skipping 1013 matching lines @@
   },
   "PushEvent": {
     "members": {
       "data": {
         "support_level": "untriaged"
       }
     },
     "support_level": "untriaged"
   },
   "PushManager": {
-    "members": {},
+    "members": {
+      "register": {
+        "support_level": "untriaged"
+      }
+    },
     "support_level": "untriaged"
   },
   "PushRegistration": {
     "members": {
       "pushEndpoint": {
         "support_level": "untriaged"
       },
       "pushRegistrationId": {
         "support_level": "untriaged"
       }
@@ skipping 3845 matching lines @@
       },
       "width": {}
     },
     "support_level": "stable"
   },
   "ScreenOrientation": {
     "members": {
       "angle": {
         "support_level": "untriaged"
       },
+      "lock": {
+        "support_level": "untriaged"
+      },
       "onchange": {
         "support_level": "untriaged"
       },
       "type": {
         "support_level": "untriaged"
       },
       "unlock": {
         "support_level": "untriaged"
       }
     },
@@ skipping 115 matching lines @@
       "id": {
         "support_level": "untriaged"
       },
       "postMessage": {
         "support_level": "untriaged"
       }
     },
     "support_level": "untriaged"
   },
   "ServiceWorkerClients": {
-    "members": {},
+    "members": {
+      "getServiced": {
+        "support_level": "untriaged"
+      }
+    },
     "support_level": "untriaged"
   },
   "ServiceWorkerContainer": {
     "members": {
       "active": {
         "support_level": "untriaged"
       },
       "controller": {
         "support_level": "untriaged"
       },
       "installing": {
         "support_level": "untriaged"
       },
+      "ready": {
+        "support_level": "untriaged"
+      },
       "register": {
         "support_level": "untriaged"
       },
       "unregister": {
         "support_level": "untriaged"
       },
       "waiting": {
         "support_level": "untriaged"
       }
     },
     "support_level": "untriaged"
   },
   "ServiceWorkerGlobalScope": {
     "members": {
       "clients": {
         "support_level": "untriaged"
       },
+      "fetch": {
+        "support_level": "untriaged"
+      },
       "nativeCaches": {
         "support_level": "untriaged"
       },
       "onmessage": {
         "support_level": "untriaged"
       },
       "scope": {
         "support_level": "untriaged"
       }
     },
     "support_level": "untriaged"
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   "ServiceWorkerRegistration": {
     "members": {
       "active": {
         "support_level": "untriaged"
       },
       "installing": {
         "support_level": "untriaged"
       },
       "scope": {
         "support_level": "untriaged"
       },
+      "unregister": {
+        "support_level": "untriaged"
+      },
       "waiting": {
         "support_level": "untriaged"
       }
     },
     "support_level": "untriaged"
   },
   "ShadowRoot": {
     "comment": "https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#api-shadow-root",
     "members": {
       "activeElement": {},
@@ skipping 4456 matching lines @@
       "importStylesheet": {},
       "removeParameter": {},
       "reset": {},
       "setParameter": {},
       "transformToDocument": {},
       "transformToFragment": {}
     },
     "support_level": "nonstandard"
   }
 }