Add helper function to test that a given URL is a valid Gaia sign in URL.

google_apis/gaia/gaia_auth_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "google_apis/gaia/gaia_auth_util.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
+#include "google_apis/gaia/gaia_urls.h"
+#include "googleurl/src/gurl.h"
 
 namespace gaia {
 
 namespace {
 const char kGmailDomain[] = "gmail.com";
 }
 
 std::string CanonicalizeEmail(const std::string& email_address) {
   std::vector<std::string> parts;
   char at = '@';
@@ skipping 29 matching lines @@
   // First canonicalize which will also verify we have proper domain part.
   std::string email = CanonicalizeEmail(email_address);
   size_t separator_pos = email.find('@');
   if (separator_pos != email.npos && separator_pos < email.length() - 1)
     return email.substr(separator_pos + 1);
   else
     NOTREACHED() << "Not a proper email address: " << email;
   return std::string();
 }
 
+bool IsGaiaSignonRealm(const GURL& url) {
+  if (!url.SchemeIsSecure())
+    return false;
+
+  // Also check "https://www.google.com" to support old style dasher logins.
+  return url == GURL(GaiaUrls::GetInstance()->gaia_origin_url()) ||
+      url == GURL("https://www.google.com/");
+}
+
 }  // namespace gaia