Pass task runners to AudioManager constructor.

media/audio/cras/cras_input_unittest.cc

Index: media/audio/cras/cras_input_unittest.cc
diff --git a/media/audio/cras/cras_input_unittest.cc b/media/audio/cras/cras_input_unittest.cc
index 3735322b0077ff1e35abac75b408c8963719cf7c..9062bbda09118d6b41c7807044e5e335fc4b74f5 100644
--- a/media/audio/cras/cras_input_unittest.cc
+++ b/media/audio/cras/cras_input_unittest.cc
@@ -4,11 +4,15 @@
 
 #include <stdint.h>
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
+#include "base/run_loop.h"
 #include "base/synchronization/waitable_event.h"
+#include "base/test/test_message_loop.h"
 #include "base/test/test_timeouts.h"
+#include "base/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "media/audio/cras/audio_manager_cras.h"
 #include "media/audio/fake_audio_log_factory.h"
@@ -38,7 +42,10 @@ class MockAudioInputCallback : public AudioInputStream::AudioInputCallback {
 
 class MockAudioManagerCrasInput : public AudioManagerCras {
  public:
-  MockAudioManagerCrasInput() : AudioManagerCras(&fake_audio_log_factory_) {}
+  MockAudioManagerCrasInput()
+      : AudioManagerCras(base::ThreadTaskRunnerHandle::Get(),
+                         base::ThreadTaskRunnerHandle::Get(),
+                         &fake_audio_log_factory_) {}
 
   // We need to override this function in order to skip checking the number
   // of active output streams. It is because the number of active streams
@@ -57,10 +64,10 @@ class CrasInputStreamTest : public testing::Test {
  protected:
   CrasInputStreamTest() {
     mock_manager_.reset(new StrictMock<MockAudioManagerCrasInput>());
+    base::RunLoop().RunUntilIdle();
   }
 
-  virtual ~CrasInputStreamTest() {
-  }
+  ~CrasInputStreamTest() override {}
 
   CrasInputStream* CreateStream(ChannelLayout layout) {
     return CreateStream(layout, kTestFramesPerPacket);
@@ -115,7 +122,9 @@ class CrasInputStreamTest : public testing::Test {
   static const uint32_t kTestFramesPerPacket;
   static const int kTestSampleRate;
 
-  scoped_ptr<StrictMock<MockAudioManagerCrasInput> > mock_manager_;
+  base::TestMessageLoop message_loop_;
+  std::unique_ptr<StrictMock<MockAudioManagerCrasInput>, AudioManagerDeleter>
+      mock_manager_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CrasInputStreamTest);