Add missing methods for FormData type

Author: NColey

baselines/dom.generated.d.ts

@@ -3796,7 +3796,12 @@ declare var FocusNavigationEvent: {
 }
 
 interface FormData {
-    append(name: any, value: any, blobName?: string): void;
+    append(name: any, value: any, fileName?: string): void;
+    delete(name: any): void;
+    get(name: any): any;
+    getAll(name: any): any;
+    has(name: any): any;
+    set(name: any, value: any, fileName?: string): void;
 }
 
 declare var FormData: {

inputfiles/addedTypes.json

@@ -1534,5 +1534,40 @@
         "name": "getElementById",
         "flavor": "DOM",
         "signatures": ["getElementById(elementId: string): HTMLElement | null"]
+    },
+    {
+        "kind": "method",
+        "interface": "FormData",
+        "name": "delete",
+        "flavor": "Web",
+        "signatures": ["delete(name: any): void"]
+    },
+    {
+        "kind": "method",
+        "interface": "FormData",
+        "name": "get",
+        "flavor": "Web",
+        "signatures": ["get(name: any): any"]
+    },
+    {
+        "kind": "method",
+        "interface": "FormData",
+        "name": "getAll",
+        "flavor": "Web",
+        "signatures": ["getAll(name: any): any"]
+    },
+    {
+        "kind": "method",
+        "interface": "FormData",
+        "name": "has",
+        "flavor": "Web",
+        "signatures": ["has(name: any): any"]
+    },
+    {
+        "kind": "method",
+        "interface": "FormData",
+        "name": "set",
+        "flavor": "Web",
+        "signatures": ["set(name: any, value: any, fileName?: string): void"]
     }
 ]

inputfiles/overridingTypes.json

@@ -1016,5 +1016,12 @@
         "interface": "DOMImplementation",
         "name": "createDocument",
         "signatures": ["createDocument(namespaceURI: string | null, qualifiedName: string | null, doctype: DocumentType | null): Document"]
+    },
+    {
+        "kind": "method",
+        "interface": "FormData",
+        "name": "append",
+        "flavor": "Web",
+        "signatures": ["append(name: any, value: any, fileName?: string): void"]
     }
  ]