Rename DesktopEngagement* to DesktopSessionDuration*.

chrome/browser/metrics/desktop_engagement/audible_contents_tracker_browsertest.cc

-// Copyright 2016 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 "chrome/browser/metrics/desktop_engagement/audible_contents_tracker.h"
-
-#include "base/path_service.h"
-#include "chrome/test/base/in_process_browser_test.h"
-#include "chrome/test/base/ui_test_utils.h"
-#include "content/public/test/browser_test_base.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-// Observer for testing AudibleContentsTracker.
-class MockAudibleContentsObserver
-    : public metrics::AudibleContentsTracker::Observer {
- public:
-  MockAudibleContentsObserver() {}
-
-  // AudibleContentsTracker::Observer:
-  void OnAudioStart() override { is_audio_playing_ = true; }
-  void OnAudioEnd() override { is_audio_playing_ = false; }
-
-  bool is_audio_playing() const { return is_audio_playing_; }
-
- private:
-  bool is_audio_playing_ = false;
-
-  DISALLOW_COPY_AND_ASSIGN(MockAudibleContentsObserver);
-};
-
-}  // namespace
-
-class AudibleContentsTrackerTest : public InProcessBrowserTest {
- public:
-  AudibleContentsTrackerTest() {}
-
-  void SetUp() override {
-    observer_.reset(new MockAudibleContentsObserver());
-    tracker_.reset(new metrics::AudibleContentsTracker(observer()));
-    InProcessBrowserTest::SetUp();
-  }
-
-  void TearDown() override {
-    InProcessBrowserTest::TearDown();
-    tracker_.reset();
-    observer_.reset();
-  }
-
-  MockAudibleContentsObserver* observer() const { return observer_.get(); }
-
- private:
-  std::unique_ptr<MockAudibleContentsObserver> observer_ = nullptr;
-  std::unique_ptr<metrics::AudibleContentsTracker> tracker_ = nullptr;
-
-  DISALLOW_COPY_AND_ASSIGN(AudibleContentsTrackerTest);
-};
-
-IN_PROC_BROWSER_TEST_F(AudibleContentsTrackerTest, TestAudioNotifications) {
-  MockAudibleContentsObserver* audio_observer = observer();
-  EXPECT_FALSE(audio_observer->is_audio_playing());
-
-  // For serving audio.
-  ASSERT_TRUE(embedded_test_server()->Start());
-  base::FilePath test_data_dir;
-  ASSERT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &test_data_dir));
-  embedded_test_server()->ServeFilesFromDirectory(
-      test_data_dir.AppendASCII("chrome/test/data/"));
-  ui_test_utils::NavigateToURL(
-      browser(), embedded_test_server()->GetURL("/autoplay_audio.html"));
-
-  // Wait until the audio starts.
-  while (!audio_observer->is_audio_playing()) {
-    base::RunLoop().RunUntilIdle();
-  }
-
-  // Wait until the audio stops.
-  while (audio_observer->is_audio_playing()) {
-    base::RunLoop().RunUntilIdle();
-  }
-}