Fix cookie editing when paritioned cookies are disabled.

Bug: 1290196
Change-Id: I05792ff5251d3da2a39b5708788fb95ec366b9f5
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3430926
Auto-Submit: Danil Somsikov <dsv@chromium.org>
Commit-Queue: Danil Somsikov <dsv@chromium.org>
Reviewed-by: Wolfgang Beyer <wolfi@chromium.org>
Commit-Queue: Wolfgang Beyer <wolfi@chromium.org>

front_end/ui/legacy/components/cookie_table/CookiesTable.ts

diff --git a/front_end/ui/legacy/components/cookie_table/CookiesTable.ts b/front_end/ui/legacy/components/cookie_table/CookiesTable.ts
index 63fcb27..6089800 100644
--- a/front_end/ui/legacy/components/cookie_table/CookiesTable.ts
+++ b/front_end/ui/legacy/components/cookie_table/CookiesTable.ts
@@ -677,7 +677,7 @@
       cookie.addAttribute(
           SDK.Cookie.Attributes.SourcePort, Number.parseInt(data[SDK.Cookie.Attributes.SourcePort], 10) || undefined);
     }
-    if (SDK.Cookie.Attributes.PartitionKey in data) {
+    if (data[SDK.Cookie.Attributes.PartitionKey]) {
       cookie.addAttribute(SDK.Cookie.Attributes.PartitionKey, data[SDK.Cookie.Attributes.PartitionKey]);
     }
     cookie.setSize(data[SDK.Cookie.Attributes.Name].length + data[SDK.Cookie.Attributes.Value].length);