Revert of Pass task runners to AudioManager constructor.

media/audio/mac/audio_low_latency_input_mac_unittest.cc

 // Copyright (c) 2012 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 <stdint.h>
 
 #include "base/environment.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/test/test_timeouts.h"
@@ skipping 89 matching lines @@
  private:
   media::SeekableBuffer buffer_;
   FILE* file_;
   int bytes_to_write_;
 };
 
 class MacAudioInputTest : public testing::Test {
  protected:
   MacAudioInputTest()
       : message_loop_(base::MessageLoop::TYPE_UI),
-        audio_manager_(
-            AudioManager::CreateForTesting(message_loop_.task_runner())) {
+        audio_manager_(AudioManager::CreateForTesting()) {
     // Wait for the AudioManager to finish any initialization on the audio loop.
     base::RunLoop().RunUntilIdle();
   }
 
-  ~MacAudioInputTest() override {
-    audio_manager_.reset();
-    base::RunLoop().RunUntilIdle();
-  }
+  ~MacAudioInputTest() override { base::RunLoop().RunUntilIdle(); }
 
   bool InputDevicesAvailable() {
     return audio_manager_->HasAudioInputDevices();
   }
 
   // Convenience method which creates a default AudioInputStream object using
   // a 10ms frame size and a sample rate which is set to the hardware sample
   // rate.
   AudioInputStream* CreateDefaultAudioInputStream() {
     int fs = static_cast<int>(AUAudioInputStream::HardwareSampleRate());
@@ skipping 13 matching lines @@
     int samples_per_packet = fs / 100;
     AudioInputStream* ais = audio_manager_->MakeAudioInputStream(
         AudioParameters(AudioParameters::AUDIO_PCM_LOW_LATENCY,
         channel_layout, fs, 16, samples_per_packet),
         AudioManagerBase::kDefaultDeviceId);
     EXPECT_TRUE(ais);
     return ais;
   }
 
   base::MessageLoop message_loop_;
-  ScopedAudioManagerPtr audio_manager_;
+  scoped_ptr<AudioManager> audio_manager_;
 };
 
 // Test Create(), Close().
 TEST_F(MacAudioInputTest, AUAudioInputStreamCreateAndClose) {
   ABORT_AUDIO_TEST_IF_NOT(InputDevicesAvailable());
   AudioInputStream* ais = CreateDefaultAudioInputStream();
   ais->Close();
 }
 
 // Test Open(), Close().
@@ skipping 103 matching lines @@
   WriteToFileAudioSink file_sink(file_name);
   fprintf(stderr, "               >> Speak into the mic while recording...\n");
   ais->Start(&file_sink);
   base::PlatformThread::Sleep(TestTimeouts::action_timeout());
   ais->Stop();
   fprintf(stderr, "               >> Recording has stopped.\n");
   ais->Close();
 }
 
 }  // namespace media