binding: Moves the check for the first access to the initial document into BindingSecurity.

chrome/browser/ssl/ssl_browser_tests.cc

Index: chrome/browser/ssl/ssl_browser_tests.cc
diff --git a/chrome/browser/ssl/ssl_browser_tests.cc b/chrome/browser/ssl/ssl_browser_tests.cc
index 298e804c30e931dbc9e8c09395cce0ebf000d185..eec35df3475ce169df783c9956d1ac91debe2bc7 100644
--- a/chrome/browser/ssl/ssl_browser_tests.cc
+++ b/chrome/browser/ssl/ssl_browser_tests.cc
@@ -1896,11 +1896,11 @@ IN_PROC_BROWSER_TEST_F(SSLUITest, TestCloseTabWithUnsafePopup) {
   nav_observer.Wait();
   // Since the popup is showing an interstitial, it shouldn't have a last
   // committed entry.
+  content::WaitForInterstitialAttach(popup);
   EXPECT_FALSE(popup->GetController().GetLastCommittedEntry());
   ASSERT_TRUE(popup->GetController().GetVisibleEntry());
   EXPECT_EQ(https_server_expired_.GetURL("/ssl/bad_iframe.html"),
             popup->GetController().GetVisibleEntry()->GetURL());
-  content::WaitForInterstitialAttach(popup);
   EXPECT_TRUE(popup->ShowingInterstitialPage());
 
   // Add another tab to make sure the browser does not exit when we close