[PasswordManager] Fix Flaky BrowserTest related to dynamically created

chrome/browser/password_manager/password_manager_test_base.cc

Index: chrome/browser/password_manager/password_manager_test_base.cc
diff --git a/chrome/browser/password_manager/password_manager_test_base.cc b/chrome/browser/password_manager/password_manager_test_base.cc
index 7afc1ecf52b287c7425f280dc2a0ad25346c9ef7..0bf74ea94aeb0ae31ba4958714a09d109a9cc176 100644
--- a/chrome/browser/password_manager/password_manager_test_base.cc
+++ b/chrome/browser/password_manager/password_manager_test_base.cc
@@ -57,8 +57,29 @@ void NavigationObserver::Wait() {
   message_loop_runner_->Run();
 }
 
+DummyStoreConsumer::DummyStoreConsumer()
+    : message_loop_runner_(new content::MessageLoopRunner) {
+}
+
+DummyStoreConsumer::~DummyStoreConsumer() {
+}
+
+void DummyStoreConsumer::RequestLoginsAndWait(
+    scoped_refptr<password_manager::PasswordStore> password_store) {
+  autofill::PasswordForm form;
+  password_store->GetLogins(
+      form, password_manager::PasswordStore::DISALLOW_PROMPT, this);
+  message_loop_runner_->Run();
+}
+
+void DummyStoreConsumer::OnGetPasswordStoreResults(
+    ScopedVector<autofill::PasswordForm> results) {
+  message_loop_runner_->Quit();
+}
+
 PromptObserver::PromptObserver() {
 }
+
 PromptObserver::~PromptObserver() {
 }