Add cross origin to Blink-driven preconnect

chrome/browser/net/predictor_browsertest.cc

Index: chrome/browser/net/predictor_browsertest.cc
diff --git a/chrome/browser/net/predictor_browsertest.cc b/chrome/browser/net/predictor_browsertest.cc
index 345b4ecdc690c99ddb9aecf3286ba0911229b26a..d8fec138848a0c13e3bed852a8bad54bf57d2832 100644
--- a/chrome/browser/net/predictor_browsertest.cc
+++ b/chrome/browser/net/predictor_browsertest.cc
@@ -309,5 +309,29 @@ IN_PROC_BROWSER_TEST_F(PredictorBrowserTest, Preconnect) {
   net_log_observer.Detach();
 }
 
+IN_PROC_BROWSER_TEST_F(PredictorBrowserTest, PreconnectAnonymous) {
+  ASSERT_TRUE(test_server()->Start());
+
+  // Create a HTML preconnect reference to the local server in the form
+  // <link rel="preconnect" href="http://test-server/">
+  // and navigate to it as a data URI.
+  GURL preconnect_url = test_server()->GetURL("");
+  std::string preconnect_content =
+      "<link rel=\"preconnect\" crossorigin href=\""
+      + preconnect_url.spec() + "\">";
+  std::string encoded;
+  base::Base64Encode(preconnect_content, &encoded);
+  std::string data_uri = "data:text/html;base64," + encoded;
+
+  net::HostPortPair host_port_pair = net::HostPortPair::FromURL(preconnect_url);
+  ConnectNetLogObserver net_log_observer("pm/" + host_port_pair.ToString());
+  net_log_observer.Attach();
+
+  ui_test_utils::NavigateToURL(browser(), GURL(data_uri));
+
+  net_log_observer.WaitForConnect();
+  net_log_observer.Detach();
+}
+
 }  // namespace chrome_browser_net