Update Streams to spec version 46c3b89 (#669)

* Add AbortSignal to PipeOptions

Spec change: whatwg/streams@46c3b89

* Un-expose ReadableStreamBYOBReader constructor

Author: MattiasBuelens

baselines/dom.generated.d.ts

@@ -929,6 +929,7 @@ interface PipeOptions {
     preventAbort?: boolean;
     preventCancel?: boolean;
     preventClose?: boolean;
+    signal?: AbortSignal;
 }
 
 interface PointerEventInit extends MouseEventInit {
@@ -12196,11 +12197,6 @@ interface ReadableStreamBYOBReader {
     releaseLock(): void;
 }
 
-declare var ReadableStreamBYOBReader: {
-    prototype: ReadableStreamBYOBReader;
-    new(stream: ReadableStream<Uint8Array>): ReadableStreamBYOBReader;
-};
-
 interface ReadableStreamBYOBRequest {
     readonly view: ArrayBufferView;
     respond(bytesWritten: number): void;

baselines/webworker.generated.d.ts

@@ -305,6 +305,7 @@ interface PipeOptions {
     preventAbort?: boolean;
     preventCancel?: boolean;
     preventClose?: boolean;
+    signal?: AbortSignal;
 }
 
 interface ProgressEventInit extends EventInit {
@@ -2503,11 +2504,6 @@ interface ReadableStreamBYOBReader {
     releaseLock(): void;
 }
 
-declare var ReadableStreamBYOBReader: {
-    prototype: ReadableStreamBYOBReader;
-    new(stream: ReadableStream<Uint8Array>): ReadableStreamBYOBReader;
-};
-
 interface ReadableStreamBYOBRequest {
     readonly view: ArrayBufferView;
     respond(bytesWritten: number): void;

inputfiles/idl/Streams.widl

@@ -43,6 +43,7 @@ dictionary PipeOptions {
     boolean? preventClose;
     boolean? preventAbort;
     boolean? preventCancel;
+    AbortSignal? signal;
 };
 
 [Exposed=(Window,Worker)]

inputfiles/overridingTypes.json

@@ -2525,11 +2525,6 @@
                 "no-interface-object": "1"
             },
             "ReadableStreamBYOBReader": {
-                "constructor": {
-                    "override-signatures": [
-                        "new(stream: ReadableStream<Uint8Array>): ReadableStreamBYOBReader"
-                    ]
-                },
                 "methods": {
                     "method": {
                         "read": {
@@ -2538,7 +2533,8 @@
                             ]
                         }
                     }
-                }
+                },
+                "no-interface-object": 1
             },
             "ReadableStreamBYOBRequest": {
                 "no-interface-object": 1
@@ -2929,6 +2925,9 @@
                         },
                         "preventCancel": {
                             "nullable": 0
+                        },
+                        "signal": {
+                            "nullable": 0
                         }
                     }
                 }