[Password Manager] Setup experiment to restrict autofilling of sync credential

chrome/browser/password_manager/chrome_password_manager_client_unittest.cc

 // Copyright 2014 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 "base/command_line.h"
 
 #include "chrome/browser/password_manager/chrome_password_manager_client.h"
 
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/test/base/chrome_render_view_host_test_harness.h"
@@ skipping 174 matching lines @@
   ChromePasswordManagerClient* client = GetClient();
   service_->RegisterReceiver(&receiver_);
   EXPECT_TRUE(client->IsLoggingActive());
 
   EXPECT_CALL(receiver_, LogSavePasswordProgress(kTestText)).Times(1);
   client->LogSavePasswordProgress(kTestText);
 
   service_->UnregisterReceiver(&receiver_);
   EXPECT_FALSE(client->IsLoggingActive());
 }
+
+TEST_F(ChromePasswordManagerClientTest, LastLoadWasTransactionalReauthPage) {
+  ChromePasswordManagerClient* client = GetClient();
+  NavigateAndCommit(
+      GURL("https://accounts.google.com/login?rart=123&continue=blah"));
+  EXPECT_TRUE(client->LastLoadWasTransactionalReauthPage());
+
+  NavigateAndCommit(GURL("https://accounts.google.com/login?param=123"));
+  EXPECT_FALSE(client->LastLoadWasTransactionalReauthPage());
+
+  NavigateAndCommit(GURL("https://site.com/login?rart=678"));

[Ilya Sherman, 2014/08/12 02:17:33]

What about rart with no value, e.g. "https://site.com/login?rart"?

[Garrett Casto, 2014/08/13 20:34:40]

It works right now. I don't think that you will get a valid URL that looks like
that so I'm not sure it matters either way. Added it to the test suite with a
comment.

+  EXPECT_FALSE(client->LastLoadWasTransactionalReauthPage());
+}