Backed out changeset 2c6e366ebc6e (bug 1502028) for wpt failures on pipe-through.dedicatedworker.html. CLOSED TREE

js/src/builtin/Stream.cpp

@@ -1140,11 +1140,27 @@ ReadableStream_getReader(JSContext* cx, unsigned argc, Value* vp)
     return true;
 }
 
-// Streams spec, 3.2.5.4. pipeThrough({ writable, readable }, options)
-// Not implemented.
+// Streams spec, 3.2.4.4. pipeThrough({ writable, readable }, options)
+static MOZ_MUST_USE bool
+ReadableStream_pipeThrough(JSContext* cx, unsigned argc, Value* vp)
+{
+    JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
+                              JSMSG_READABLESTREAM_METHOD_NOT_IMPLEMENTED, "pipeThrough");
+    return false;
+    // // Step 1: Perform ? Invoke(this, "pipeTo", « writable, options »).
 
-// Streams spec, 3.2.5.5. pipeTo(dest, { preventClose, preventAbort, preventCancel } = {})
-// Not implemented.
+    // // Step 2: Return readable.
+}
+
+// Streams spec, 3.2.4.5. pipeTo(dest, { preventClose, preventAbort, preventCancel } = {})
+// TODO: Unimplemented since spec is not complete yet.
+static MOZ_MUST_USE bool
+ReadableStream_pipeTo(JSContext* cx, unsigned argc, Value* vp)
+{
+    JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
+                              JSMSG_READABLESTREAM_METHOD_NOT_IMPLEMENTED, "pipeTo");
+    return false;
+}
 
 static MOZ_MUST_USE bool
 ReadableStreamTee(JSContext* cx, Handle<ReadableStream*> stream, bool cloneForBranch2,
@@ -1186,6 +1202,8 @@ ReadableStream_tee(JSContext* cx, unsigned argc, Value* vp)
 static const JSFunctionSpec ReadableStream_methods[] = {
     JS_FN("cancel",         ReadableStream_cancel,      1, 0),
     JS_FN("getReader",      ReadableStream_getReader,   0, 0),
+    JS_FN("pipeThrough",    ReadableStream_pipeThrough, 2, 0),
+    JS_FN("pipeTo",         ReadableStream_pipeTo,      1, 0),
     JS_FN("tee",            ReadableStream_tee,         0, 0),
     JS_FS_END
 };