[Origin API] Drop Location and WorkerLocation conversions.

After discussion with Anne in [1], it makes sense to drop conversions
from `Location` and `WorkerLocation` objects via `Origin.from()`. Those
can meaningfully differ from the origin of the context to which they
belong due to sandboxing, and we should encourage developers to use the
right `Origin` representation going forward.

[1]: whatwg/html#11846 (comment)

Bug: 434131026
Change-Id: Ie8101ac9743767a32c109b83bdc82c9bb715d3b3

Author: mikewest

html/browsers/origin/tentative/api/origin-from-location.window.js

@@ -2,23 +2,8 @@
 // META: script=/common/get-host-info.sub.js
 
 test(t => {
-  const origin = Origin.from(window.location);
-  assert_true(!!origin);
-  assert_false(origin.opaque);
-  assert_true(origin.isSameOrigin(Origin.from(get_host_info().ORIGIN)));
-}, `Origin.from(window.location) returns a tuple origin.`);
-
-async_test(t => {
-  const el = document.createElement('iframe');
-  el.src = "/common/blank.html";
-  el.onload = t.step_func_done(_ => {
-    const origin = Origin.from(el.contentWindow.location);
-    assert_true(!!origin);
-    assert_false(origin.opaque);
-    assert_true(origin.isSameOrigin(Origin.from(get_host_info().ORIGIN)));
-  });
-  document.body.appendChild(el);
-}, `Origin.from(Location) returns a tuple origin for same-origin frames.`);
+  assert_throws_js(TypeError, _ => Origin.from(window.location));
+}, `Origin.from(window.location) throws.`);
 
 async_test(t => {
   const el = document.createElement('iframe');
@@ -28,26 +13,3 @@ async_test(t => {
   });
   document.body.appendChild(el);
 }, `Origin.from(Location) throws for cross-origin frames.`);
-
-async_test(t => {
-  const w = window.open("/html/browsers/windows/resources/post-to-opener.html");
-  window.addEventListener("message", t.step_func(e => {
-    if (e.source === w) {
-      const origin = Origin.from(w.location);
-      assert_true(!!origin);
-      assert_false(origin.opaque);
-      assert_true(origin.isSameOrigin(Origin.from(get_host_info().ORIGIN)));
-      t.done();
-    }
-  }));
-}, `Origin.from(Location) returns a tuple origin for same-origin windows.`);
-
-async_test(t => {
-  const w = window.open(get_host_info().REMOTE_ORIGIN + "/html/browsers/windows/resources/post-to-opener.html");
-  window.addEventListener("message", t.step_func(e => {
-    if (e.source === w) {
-      assert_throws_js(TypeError, _ => Origin.from(w.location));
-      t.done();
-    }
-  }));
-}, `Origin.from(Location) throws for cross-origin windows.`);