Revert of Discount for inactivity timeout for recording session length. (https://codereview.chromiu…

chrome/browser/metrics/desktop_engagement/desktop_engagement_service_unittest.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/desktop_engagement_service.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/test/histogram_tester.h"
 #include "base/test/test_mock_time_task_runner.h"
@@ skipping 129 matching lines @@
   // Wait until the session expires.
   while (!instance.is_timeout()) {
     base::RunLoop().RunUntilIdle();
   }
 
   EXPECT_FALSE(instance.in_session());
   EXPECT_FALSE(instance.is_visible());
   EXPECT_FALSE(instance.is_audio_playing());
   histogram_tester.ExpectTotalCount("Session.TotalDuration", 1);
 }
-
-TEST(DesktopEngagementServiceTest, TestTimeoutDiscount) {
-  base::MessageLoop loop(base::MessageLoop::TYPE_DEFAULT);
-  base::HistogramTester histogram_tester;
-
-  MockDesktopEngagementService instance;
-  instance.SetInactivityTimeoutForTesting(2);
-
-  instance.OnVisibilityChanged(true);
-  instance.OnUserEvent();
-  histogram_tester.ExpectTotalCount("Session.TotalDuration", 0);
-
-  // Wait until the session expires.
-  while (!instance.is_timeout()) {
-    base::RunLoop().RunUntilIdle();
-  }
-
-  histogram_tester.ExpectTotalCount("Session.TotalDuration", 1);
-
-  // The recorded value should be in the 0 bucket even though inactivity timeout
-  // is 2 seconds.
-  histogram_tester.ExpectUniqueSample("Session.TotalDuration", 0, 1);
-}