[Reland] Allow headless TabSocket in isolated worlds & remove obsolete logic

headless/test/headless_browser_test.cc

Index: headless/test/headless_browser_test.cc
diff --git a/headless/test/headless_browser_test.cc b/headless/test/headless_browser_test.cc
index 39c40d77ce6b580c2eb50028cb77fa0f0374d11b..3071b1238cf0217d4d266cdadcd9bb2a955d3bb5 100644
--- a/headless/test/headless_browser_test.cc
+++ b/headless/test/headless_browser_test.cc
@@ -229,7 +229,8 @@ void HeadlessAsyncDevTooledBrowserTest::RunTest() {
   browser()->SetDefaultBrowserContext(browser_context_);
 
   web_contents_ = browser_context_->CreateWebContentsBuilder()
-                      .CreateTabSocket(GetCreateTabSocket())
+                      .CreateTabSocket(GetCreateTabSocket(),
+                                       GetCreateTabSocketOnlyForIsolatedWorld())
                       .Build();
   web_contents_->AddObserver(this);
 
@@ -252,4 +253,9 @@ bool HeadlessAsyncDevTooledBrowserTest::GetCreateTabSocket() {
   return false;
 }
 
+bool HeadlessAsyncDevTooledBrowserTest::
+    GetCreateTabSocketOnlyForIsolatedWorld() {
+  return false;
+}
+
 }  // namespace headless