Change NavigationController::LoadURL to take a Referrer class instead of a GURL as referrer

chrome/test/base/browser_with_test_window_test.cc

Index: chrome/test/base/browser_with_test_window_test.cc
diff --git a/chrome/test/base/browser_with_test_window_test.cc b/chrome/test/base/browser_with_test_window_test.cc
index 3b01691a99c9cde2cdc2f3968248aa43a05633fa..f4077a53e16970004f19826c1a6573dc991d0caf 100644
--- a/chrome/test/base/browser_with_test_window_test.cc
+++ b/chrome/test/base/browser_with_test_window_test.cc
@@ -116,7 +116,7 @@ void BrowserWithTestWindowTest::NavigateAndCommit(
     NavigationController* controller,
     const GURL& url) {
   controller->LoadURL(
-      url, GURL(), content::PAGE_TRANSITION_LINK, std::string());
+      url, content::Referrer(), content::PAGE_TRANSITION_LINK, std::string());
   CommitPendingLoad(controller);
 }