Reland of Switching AudioOutputAuthorizationHandler from using AudioManager interface to AudioSystem one.

media/audio/audio_system_impl.cc

Index: media/audio/audio_system_impl.cc
diff --git a/media/audio/audio_system_impl.cc b/media/audio/audio_system_impl.cc
index fdffa70fda0f70cbce1e60457eb2044e9287a254..a6c51a67d863a6086b33b9e470c97d1b8ebf4471 100644
--- a/media/audio/audio_system_impl.cc
+++ b/media/audio/audio_system_impl.cc
@@ -7,6 +7,7 @@
 #include "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/task_runner_util.h"
+#include "media/audio/audio_device_description.h"
 #include "media/audio/audio_manager.h"
 
 // Using base::Unretained for |audio_manager_| is safe since it is deleted after
@@ -21,11 +22,27 @@
   DCHECK(audio_manager->GetTaskRunner()->BelongsToCurrentThread());
 
   // TODO(olka): remove this when AudioManager::GetInputStreamParameters()
-  // works this way on all the platforms.
+  // returns invalid parameters if the device is not found.
   if (!audio_manager->HasAudioInputDevices())
     return AudioParameters();
 
   return audio_manager->GetInputStreamParameters(device_id);
+}
+
+AudioParameters GetOutputParametersOnDeviceThread(
+    AudioManager* audio_manager,
+    const std::string& device_id) {
+  DCHECK(audio_manager->GetTaskRunner()->BelongsToCurrentThread());
+
+  // TODO(olka): remove this when
+  // AudioManager::Get[Default]OutputStreamParameters() returns invalid
+  // parameters if the device is not found.
+  if (!audio_manager->HasAudioOutputDevices())
+    return AudioParameters();
+
+  return media::AudioDeviceDescription::IsDefaultDevice(device_id)
+             ? audio_manager->GetDefaultOutputStreamParameters()
+             : audio_manager->GetOutputStreamParameters(device_id);
 }
 
 }  // namespace
@@ -62,6 +79,22 @@
       std::move(on_params_cb));
 }
 
+void AudioSystemImpl::GetOutputStreamParameters(
+    const std::string& device_id,
+    OnAudioParamsCallback on_params_cb) const {
+  if (GetTaskRunner()->BelongsToCurrentThread()) {
+    GetTaskRunner()->PostTask(
+        FROM_HERE, base::Bind(on_params_cb, GetOutputParametersOnDeviceThread(
+                                                audio_manager_, device_id)));
+    return;
+  }
+  base::PostTaskAndReplyWithResult(
+      GetTaskRunner(), FROM_HERE,
+      base::Bind(&GetOutputParametersOnDeviceThread,
+                 base::Unretained(audio_manager_), device_id),
+      std::move(on_params_cb));
+}
+
 void AudioSystemImpl::HasInputDevices(OnBoolCallback on_has_devices_cb) const {
   if (GetTaskRunner()->BelongsToCurrentThread()) {
     GetTaskRunner()->PostTask(