Introduce ManagePasswordsState class.

chrome/browser/ui/passwords/manage_passwords_bubble_model_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/metrics/histogram_samples.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/histogram_tester.h"
 #include "chrome/browser/ui/passwords/manage_passwords_bubble.h"
 #include "chrome/browser/ui/passwords/manage_passwords_bubble_model.h"
 #include "chrome/browser/ui/passwords/manage_passwords_ui_controller_mock.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/password_manager/content/common/credential_manager_types.h"
 #include "components/password_manager/core/browser/password_manager_metrics_util.h"
 #include "components/password_manager/core/common/password_manager_pref_names.h"
 #include "components/password_manager/core/common/password_manager_ui.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/web_contents_tester.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 const char kUIDismissalReasonMetric[] = "PasswordManager.UIDismissalReason";
 
 class ManagePasswordsBubbleModelTest : public testing::Test {
  public:
   ManagePasswordsBubbleModelTest()
       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP),
         test_web_contents_(
             content::WebContentsTester::CreateTestWebContents(&profile_,
-                                                              NULL)) {}
+                                                              nullptr)) {}
 
   void SetUp() override {
     // Create the test UIController here so that it's bound to
     // |test_web_contents_| and therefore accessible to the model.
     new ManagePasswordsUIControllerMock(test_web_contents_.get());
 
     model_.reset(new ManagePasswordsBubbleModel(test_web_contents_.get()));
   }
 
   void TearDown() override { model_.reset(); }
@@ skipping 65 matching lines @@
   base::HistogramTester histogram_tester;
   model_->OnBubbleHidden();
   EXPECT_EQ(model_->dismissal_reason(),
             password_manager::metrics_util::NOT_DISPLAYED);
   EXPECT_FALSE(controller()->saved_password());
   EXPECT_FALSE(controller()->never_saved_password());
 
   scoped_ptr<base::HistogramSamples> samples(
       histogram_tester.GetHistogramSamplesSinceCreation(
           kUIDismissalReasonMetric));
-  EXPECT_EQ(NULL, samples.get());
+  EXPECT_FALSE(samples);
 }
 
 TEST_F(ManagePasswordsBubbleModelTest, CloseWithoutInteraction) {
   base::HistogramTester histogram_tester;
   PretendPasswordWaiting();
   model_->OnBubbleHidden();
   EXPECT_EQ(model_->dismissal_reason(),
             password_manager::metrics_util::NO_DIRECT_INTERACTION);
   EXPECT_EQ(password_manager::ui::PENDING_PASSWORD_STATE,
             model_->state());
@@ skipping 169 matching lines @@
   model_->OnAutoSignInToastTimeout();
   model_->OnBubbleHidden();
   EXPECT_EQ(model_->dismissal_reason(),
             password_manager::metrics_util::AUTO_SIGNIN_TOAST_TIMEOUT);
 
   histogram_tester.ExpectUniqueSample(
       kUIDismissalReasonMetric,
       password_manager::metrics_util::AUTO_SIGNIN_TOAST_TIMEOUT,
       1);
 }