Move the FileAPI directory from web-platform-tests/ to wpt/.

third_party/WebKit/LayoutTests/imported/web-platform-tests/FileAPI/idlharness.idl

-[Constructor,
- Constructor(sequence<(ArrayBuffer or ArrayBufferView or Blob or DOMString)> blobParts, optional BlobPropertyBag options), Exposed=Window,Worker]
-interface Blob {
-
-  readonly attribute unsigned long long size;
-  readonly attribute DOMString type;
-  readonly attribute boolean isClosed;
-
-  //slice Blob into byte-ranged chunks
-
-  Blob slice([Clamp] optional long long start,
-             [Clamp] optional long long end,
-             optional DOMString contentType);
-  void close();
-
-};
-
-dictionary BlobPropertyBag {
-  DOMString type = "";
-};
-
-[Constructor(sequence<(Blob or DOMString or ArrayBufferView or ArrayBuffer)> fileBits,
-[EnsureUTF16] DOMString fileName, optional FilePropertyBag options), Exposed=Window,Worker]
-interface File : Blob {
-
-  readonly attribute DOMString name;
-  readonly attribute long long lastModified;
-
-};
-
-dictionary FilePropertyBag {
-
-  DOMString type = "";
-  long long lastModified;
-
-};
-
-[Exposed=Window,Worker] interface FileList {
-  getter File? item(unsigned long index);
-  readonly attribute unsigned long length;
-};
-
-[Constructor, Exposed=Window,Worker]
-interface FileReader: EventTarget {
-
-  // async read methods
-  void readAsArrayBuffer(Blob blob);
-  void readAsText(Blob blob, optional DOMString label);
-  void readAsDataURL(Blob blob);
-
-  void abort();
-
-  // states
-  const unsigned short EMPTY = 0;
-  const unsigned short LOADING = 1;
-  const unsigned short DONE = 2;
-
-  readonly attribute unsigned short readyState;
-
-  // File or Blob data
-  readonly attribute (DOMString or ArrayBuffer)? result;
-
-  readonly attribute DOMError? error;
-
-  // event handler attributes
-  attribute EventHandler onloadstart;
-  attribute EventHandler onprogress;
-  attribute EventHandler onload;
-  attribute EventHandler onabort;
-  attribute EventHandler onerror;
-  attribute EventHandler onloadend;
-
-};
-
-partial interface URL {
-
-  static DOMString createObjectURL(Blob blob);
-  static DOMString createFor(Blob blob);
-  static void revokeObjectURL(DOMString url);
-
-};