Revert of Gardening: Revert "Use AudioStreamMonitor to control power save blocking."

chrome/browser/media/audio_stream_monitor_unittest.cc

Index: chrome/browser/media/audio_stream_monitor_unittest.cc
diff --git a/chrome/browser/media/audio_stream_monitor_unittest.cc b/chrome/browser/media/audio_stream_monitor_unittest.cc
deleted file mode 100644
index 58c4adbbcef579bc7c6b09736bcc1abc0d189697..0000000000000000000000000000000000000000
--- a/chrome/browser/media/audio_stream_monitor_unittest.cc
+++ /dev/null
@@ -1,278 +0,0 @@
-// 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 "chrome/browser/media/audio_stream_monitor.h"
-
-#include <map>
-#include <utility>
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/test/simple_test_tick_clock.h"
-#include "chrome/test/base/testing_profile.h"
-#include "content/public/browser/invalidate_type.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_contents_delegate.h"
-#include "content/public/test/test_browser_thread_bundle.h"
-#include "media/audio/audio_power_monitor.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-using ::testing::InvokeWithoutArgs;
-
-namespace {
-
-const int kStreamId = 3;
-const int kAnotherStreamId = 6;
-
-// Used to confirm audio indicator state changes occur at the correct times.
-class MockWebContentsDelegate : public content::WebContentsDelegate {
- public:
-  MOCK_METHOD2(NavigationStateChanged,
-               void(const content::WebContents* source,
-                    content::InvalidateTypes changed_flags));
-};
-
-}  // namespace
-
-class AudioStreamMonitorTest : public testing::Test {
- public:
-  AudioStreamMonitorTest() {
-    // Start |clock_| at non-zero.
-    clock_.Advance(base::TimeDelta::FromSeconds(1000000));
-
-    // Create a WebContents instance and set it to use our mock delegate.
-    web_contents_.reset(content::WebContents::Create(
-        content::WebContents::CreateParams(&profile_, NULL)));
-    web_contents_->SetDelegate(&mock_web_contents_delegate_);
-
-    // Create an AudioStreamMonitor instance whose lifecycle is tied to that of
-    // |web_contents_|, and override its clock with the test clock.
-    AudioStreamMonitor::CreateForWebContents(web_contents_.get());
-    CHECK(audio_stream_monitor());
-    const_cast<base::TickClock*&>(audio_stream_monitor()->clock_) = &clock_;
-  }
-
-  AudioStreamMonitor* audio_stream_monitor() {
-    return AudioStreamMonitor::FromWebContents(web_contents_.get());
-  }
-
-  base::TimeTicks GetTestClockTime() { return clock_.NowTicks(); }
-
-  void AdvanceClock(const base::TimeDelta& delta) { clock_.Advance(delta); }
-
-  AudioStreamMonitor::ReadPowerAndClipCallback CreatePollCallback(
-      int stream_id) {
-    return base::Bind(
-        &AudioStreamMonitorTest::ReadPower, base::Unretained(this), stream_id);
-  }
-
-  void SetStreamPower(int stream_id, float power) {
-    current_power_[stream_id] = power;
-  }
-
-  void SimulatePollTimerFired() { audio_stream_monitor()->Poll(); }
-
-  void SimulateOffTimerFired() { audio_stream_monitor()->MaybeToggle(); }
-
-  void ExpectIsPolling(int stream_id, bool is_polling) {
-    AudioStreamMonitor* const monitor = audio_stream_monitor();
-    EXPECT_EQ(is_polling,
-              monitor->poll_callbacks_.find(stream_id) !=
-                  monitor->poll_callbacks_.end());
-    EXPECT_EQ(!monitor->poll_callbacks_.empty(),
-              monitor->poll_timer_.IsRunning());
-  }
-
-  void ExpectTabWasRecentlyAudible(bool was_audible,
-                                   const base::TimeTicks& last_blurt_time) {
-    AudioStreamMonitor* const monitor = audio_stream_monitor();
-    EXPECT_EQ(was_audible, monitor->was_recently_audible_);
-    EXPECT_EQ(last_blurt_time, monitor->last_blurt_time_);
-    EXPECT_EQ(monitor->was_recently_audible_, monitor->off_timer_.IsRunning());
-  }
-
-  void ExpectWebContentsWillBeNotifiedOnce(bool should_be_audible) {
-    EXPECT_CALL(mock_web_contents_delegate_,
-                NavigationStateChanged(web_contents_.get(),
-                                       content::INVALIDATE_TYPE_TAB))
-        .WillOnce(InvokeWithoutArgs(
-            this,
-            should_be_audible
-                ? &AudioStreamMonitorTest::ExpectIsNotifyingForToggleOn
-                : &AudioStreamMonitorTest::ExpectIsNotifyingForToggleOff))
-        .RetiresOnSaturation();
-  }
-
-  static base::TimeDelta one_polling_interval() {
-    return base::TimeDelta::FromSeconds(1) /
-           AudioStreamMonitor::kPowerMeasurementsPerSecond;
-  }
-
-  static base::TimeDelta holding_period() {
-    return base::TimeDelta::FromMilliseconds(
-        AudioStreamMonitor::kHoldOnMilliseconds);
-  }
-
- private:
-  std::pair<float, bool> ReadPower(int stream_id) {
-    return std::make_pair(current_power_[stream_id], false);
-  }
-
-  void ExpectIsNotifyingForToggleOn() {
-    EXPECT_TRUE(audio_stream_monitor()->WasRecentlyAudible());
-  }
-
-  void ExpectIsNotifyingForToggleOff() {
-    EXPECT_FALSE(audio_stream_monitor()->WasRecentlyAudible());
-  }
-
-  content::TestBrowserThreadBundle browser_thread_bundle_;
-  TestingProfile profile_;
-  MockWebContentsDelegate mock_web_contents_delegate_;
-  base::SimpleTestTickClock clock_;
-  std::map<int, float> current_power_;
-  scoped_ptr<content::WebContents> web_contents_;
-
-  DISALLOW_COPY_AND_ASSIGN(AudioStreamMonitorTest);
-};
-
-// Tests that AudioStreamMonitor is polling while it has a
-// ReadPowerAndClipCallback, and is not polling at other times.
-TEST_F(AudioStreamMonitorTest, PollsWhenProvidedACallback) {
-  EXPECT_FALSE(audio_stream_monitor()->WasRecentlyAudible());
-  ExpectIsPolling(kStreamId, false);
-
-  audio_stream_monitor()->StartMonitoringStream(kStreamId,
-                                                CreatePollCallback(kStreamId));
-  EXPECT_FALSE(audio_stream_monitor()->WasRecentlyAudible());
-  ExpectIsPolling(kStreamId, true);
-
-  audio_stream_monitor()->StopMonitoringStream(kStreamId);
-  EXPECT_FALSE(audio_stream_monitor()->WasRecentlyAudible());
-  ExpectIsPolling(kStreamId, false);
-}
-
-// Tests that AudioStreamMonitor debounces the power level readings it's taking,
-// which could be fluctuating rapidly between the audible versus silence
-// threshold.  See comments in audio_stream_monitor.h for expected behavior.
-TEST_F(AudioStreamMonitorTest,
-       ImpulsesKeepIndicatorOnUntilHoldingPeriodHasPassed) {
-  audio_stream_monitor()->StartMonitoringStream(kStreamId,
-                                                CreatePollCallback(kStreamId));
-
-  // Expect WebContents will get one call form AudioStreamMonitor to toggle the
-  // indicator on upon the very first poll.
-  ExpectWebContentsWillBeNotifiedOnce(true);
-
-  // Loop, each time testing a slightly longer period of polled silence.  The
-  // indicator should remain on throughout.
-  int num_silence_polls = 0;
-  base::TimeTicks last_blurt_time;
-  do {
-    // Poll an audible signal, and expect tab indicator state is on.
-    SetStreamPower(kStreamId, media::AudioPowerMonitor::max_power());
-    last_blurt_time = GetTestClockTime();
-    SimulatePollTimerFired();
-    ExpectTabWasRecentlyAudible(true, last_blurt_time);
-    AdvanceClock(one_polling_interval());
-
-    // Poll a silent signal repeatedly, ensuring that the indicator is being
-    // held on during the holding period.
-    SetStreamPower(kStreamId, media::AudioPowerMonitor::zero_power());
-    for (int i = 0; i < num_silence_polls; ++i) {
-      SimulatePollTimerFired();
-      ExpectTabWasRecentlyAudible(true, last_blurt_time);
-      // Note: Redundant off timer firings should not have any effect.
-      SimulateOffTimerFired();
-      ExpectTabWasRecentlyAudible(true, last_blurt_time);
-      AdvanceClock(one_polling_interval());
-    }
-
-    ++num_silence_polls;
-  } while (GetTestClockTime() < last_blurt_time + holding_period());
-
-  // At this point, the clock has just advanced to beyond the holding period, so
-  // the next firing of the off timer should turn off the tab indicator.  Also,
-  // make sure it stays off for several cycles thereafter.
-  ExpectWebContentsWillBeNotifiedOnce(false);
-  for (int i = 0; i < 10; ++i) {
-    SimulateOffTimerFired();
-    ExpectTabWasRecentlyAudible(false, last_blurt_time);
-    AdvanceClock(one_polling_interval());
-  }
-}
-
-// Tests that the AudioStreamMonitor correctly processes the blurts from two
-// different streams in the same tab.
-TEST_F(AudioStreamMonitorTest, HandlesMultipleStreamsBlurting) {
-  audio_stream_monitor()->StartMonitoringStream(kStreamId,
-                                                CreatePollCallback(kStreamId));
-  audio_stream_monitor()->StartMonitoringStream(
-      kAnotherStreamId,
-      CreatePollCallback(kAnotherStreamId));
-
-  base::TimeTicks last_blurt_time;
-  ExpectTabWasRecentlyAudible(false, last_blurt_time);
-
-  // Measure audible sound from the first stream and silence from the second.
-  // The indicator turns on (i.e., tab was recently audible).
-  ExpectWebContentsWillBeNotifiedOnce(true);
-  SetStreamPower(kStreamId, media::AudioPowerMonitor::max_power());
-  SetStreamPower(kAnotherStreamId, media::AudioPowerMonitor::zero_power());
-  last_blurt_time = GetTestClockTime();
-  SimulatePollTimerFired();
-  ExpectTabWasRecentlyAudible(true, last_blurt_time);
-
-  // Halfway through the holding period, the second stream joins in.  The
-  // indicator stays on.
-  AdvanceClock(holding_period() / 2);
-  SimulateOffTimerFired();
-  SetStreamPower(kAnotherStreamId, media::AudioPowerMonitor::max_power());
-  last_blurt_time = GetTestClockTime();
-  SimulatePollTimerFired();  // Restarts holding period.
-  ExpectTabWasRecentlyAudible(true, last_blurt_time);
-
-  // Now, measure silence from both streams.  After an entire holding period
-  // has passed (since the second stream joined in), the indicator should turn
-  // off.
-  ExpectWebContentsWillBeNotifiedOnce(false);
-  AdvanceClock(holding_period());
-  SimulateOffTimerFired();
-  SetStreamPower(kStreamId, media::AudioPowerMonitor::zero_power());
-  SetStreamPower(kAnotherStreamId, media::AudioPowerMonitor::zero_power());
-  SimulatePollTimerFired();
-  ExpectTabWasRecentlyAudible(false, last_blurt_time);
-
-  // Now, measure silence from the first stream and audible sound from the
-  // second.  The indicator turns back on.
-  ExpectWebContentsWillBeNotifiedOnce(true);
-  SetStreamPower(kAnotherStreamId, media::AudioPowerMonitor::max_power());
-  last_blurt_time = GetTestClockTime();
-  SimulatePollTimerFired();
-  ExpectTabWasRecentlyAudible(true, last_blurt_time);
-
-  // From here onwards, both streams are silent.  Halfway through the holding
-  // period, the indicator should not have changed.
-  SetStreamPower(kAnotherStreamId, media::AudioPowerMonitor::zero_power());
-  AdvanceClock(holding_period() / 2);
-  SimulatePollTimerFired();
-  SimulateOffTimerFired();
-  ExpectTabWasRecentlyAudible(true, last_blurt_time);
-
-  // Just past the holding period, the indicator should be turned off.
-  ExpectWebContentsWillBeNotifiedOnce(false);
-  AdvanceClock(holding_period() - (GetTestClockTime() - last_blurt_time));
-  SimulateOffTimerFired();
-  ExpectTabWasRecentlyAudible(false, last_blurt_time);
-
-  // Polling should not turn the indicator back while both streams are remaining
-  // silent.
-  for (int i = 0; i < 100; ++i) {
-    AdvanceClock(one_polling_interval());
-    SimulatePollTimerFired();
-    ExpectTabWasRecentlyAudible(false, last_blurt_time);
-  }
-}