Improve idlharness-ShadowRealm integration

By exposing a fetch_spec() on globalThis in testharness-shadowrealm-inner,
we no longer need to have IDL tests in separate files for ShadowRealm, as
the regular idlharness.js will just run there.

Delete all existing idlharness-shadowrealm.window.js files and incorporate
them into their neighbouring idlharness.any.js files.

It seems sufficient to run the IDL tests only in shadowrealm-in-window;
repeating them in every ShadowRealm scope seems like overkill.

Author: ptomato

compression/idlharness-shadowrealm.window.js

@@ -1,5 +1,6 @@
 // META: script=/resources/WebIDLParser.js
 // META: script=/resources/idlharness.js
+// META: global=window,dedicatedworker,shadowrealm-in-window
 
 'use strict';
 

compression/idlharness.https.any.js

@@ -1,5 +1,6 @@
 // META: script=/resources/WebIDLParser.js
 // META: script=/resources/idlharness.js
+// META: global=window,dedicatedworker,shadowrealm-in-window
 
 // https://console.spec.whatwg.org/
 

console/idlharness-shadowrealm.window.js

@@ -1,4 +1,4 @@
-// META: global=worker
+// META: global=worker,shadowrealm-in-window
 // META: script=/resources/WebIDLParser.js
 // META: script=/resources/idlharness.js
 // META: timeout=long

console/idlharness.any.js

@@ -1,4 +1,4 @@
-// META: global=window,worker
+// META: global=window,worker,shadowrealm-in-window
 // META: script=/resources/WebIDLParser.js
 // META: script=/resources/idlharness.js
 

dom/idlharness-shadowrealm.window.js

@@ -1,4 +1,4 @@
-// META: global=window,worker
+// META: global=window,worker,shadowrealm-in-window
 // META: script=/resources/WebIDLParser.js
 // META: script=/resources/idlharness.js
 // META: timeout=long
@@ -11,6 +11,10 @@ idl_test(
   ['hr-time'],
   ['html', 'dom'],
   async idl_array => {
+    if (self.GLOBAL.isShadowRealm()) {
+      return;
+    }
+
     if (self.GLOBAL.isWorker()) {
       idl_array.add_objects({ WorkerGlobalScope: ['self'] });
     } else {