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

chrome/browser/password_manager/chrome_password_manager_client_unittest.cc

Index: chrome/browser/password_manager/chrome_password_manager_client_unittest.cc
diff --git a/chrome/browser/password_manager/chrome_password_manager_client_unittest.cc b/chrome/browser/password_manager/chrome_password_manager_client_unittest.cc
index 100a3e6b7fca7c43eaa4a5a26a1c6ce957fe8edd..96e1a15666772ddf6c0670b302d245fdf09267e7 100644
--- a/chrome/browser/password_manager/chrome_password_manager_client_unittest.cc
+++ b/chrome/browser/password_manager/chrome_password_manager_client_unittest.cc
@@ -192,3 +192,16 @@ TEST_F(ChromePasswordManagerClientTest, LogToAReceiver) {
   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());
+}