Auto merge of #15536 - asajeffrey:script-document-domain-setter, r=nox

Implement setter for document.domain

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This PR implements the setter for `document.domain`.

It builds on #15438 and #15478, only the last commit is part of this PR.

It includes tests for similar-origin security checks.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #934.
- [X] There are tests for these changes.

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components/script/dom/webidls/Document.webidl

@@ -81,7 +81,7 @@ partial /*sealed*/ interface Document {
   // resource metadata management
   [/*PutForwards=href, */Unforgeable]
   readonly attribute Location? location;
-  readonly attribute DOMString domain;
+  [SetterThrows] attribute DOMString domain;
   readonly attribute DOMString referrer;
   [Throws]
   attribute DOMString cookie;

components/script/dom/webidls/History.webidl

@@ -10,7 +10,7 @@ interface History {
   readonly attribute unsigned long length;
   // attribute ScrollRestoration scrollRestoration;
   // readonly attribute any state;
-  void go(optional long delta = 0);
+  [Throws] void go(optional long delta = 0);
   void back();
   void forward();
   // void pushState(any data, DOMString title, optional USVString? url = null);

components/script/dom/webidls/Location.webidl

@@ -4,26 +4,24 @@
 
 // https://html.spec.whatwg.org/multipage/#location
 [Exposed=Window, Unforgeable] interface Location {
-  /*stringifier*/ attribute USVString href;
-  readonly attribute USVString origin;
-           attribute USVString protocol;
-           attribute USVString host;
-           attribute USVString hostname;
-           attribute USVString port;
-           attribute USVString pathname;
-           attribute USVString search;
-           attribute USVString hash;
+  /*stringifier*/ [Throws] attribute USVString href;
+  [Throws] readonly attribute USVString origin;
+  [Throws]          attribute USVString protocol;
+  [Throws]          attribute USVString host;
+  [Throws]          attribute USVString hostname;
+  [Throws]          attribute USVString port;
+  [Throws]          attribute USVString pathname;
+  [Throws]          attribute USVString search;
+  [Throws]          attribute USVString hash;
 
-  [Throws]
-  void assign(USVString url);
-  [Throws]
-  void replace(USVString url);
-  void reload();
+  [Throws] void assign(USVString url);
+  [Throws] void replace(USVString url);
+  [Throws] void reload();
 
   //[SameObject] readonly attribute USVString[] ancestorOrigins;
 
   // This is only doing as well as gecko right now.
   // https://github.com/servo/servo/issues/7590 is on file for
   // adding attribute stringifier support.
-  stringifier;
+  [Throws] stringifier;
 };