Bug 1613909 - Enable SharedArrayBuffer and wasm for broadcastChannel tests, r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D62612

--HG--
extra : moz-landing-system : lando

dom/broadcastchannel/tests/mochitest.ini

@@ -1,4 +1,10 @@
 [DEFAULT]
+prefs =
+  dom.postMessage.sharedArrayBuffer.bypassCOOP_COEP.insecure.enabled=true
+  browser.tabs.remote.useCrossOriginOpenerPolicy=true
+  browser.tabs.remote.useCrossOriginEmbedderPolicy=true
+  dom.postMessage.sharedArrayBuffer.withCOOP_COEP=true
+  javascript.options.shared_memory=true
 support-files =
   iframe_broadcastchannel.html
   broadcastchannel_sharedWorker.js

dom/broadcastchannel/tests/test_wasm.html

@@ -47,17 +47,6 @@ function create_wasmModule() {
   });
 }
 
-function enable_sab() {
-  SpecialPowers.pushPrefEnv(
-    {"set": [
-      ["dom.postMessage.sharedArrayBuffer.bypassCOOP_COEP.insecure.enabled", true],
-      ["browser.tabs.remote.useCrossOriginOpenerPolicy", true],
-      ["browser.tabs.remote.useCrossOriginEmbedderPolicy", true],
-      ["dom.postMessage.sharedArrayBuffer.withCOOP_COEP", true],
-      ["javascript.options.shared_memory", true],
-    ]}, next);
-}
-
 function test_wasm() {
   info("BroadcastChannel + WASM");
 
@@ -139,7 +128,6 @@ function test_sab_worker() {
 }
 
 const tests = [
-  enable_sab,
   create_wasmModule,
 
   test_wasm,