Plumb AudioLog support into AudioManager.

AudioManager is now also an AudioLogFactory.  Changing the constructor
of AudioManager isn't viable due to its psuedo-singleton behavior, so
MediaInternal's AudioLogFactory must be injected after construction.

The next step after this CL is to have AudioOutputDispatcherImpl objects
own an AudioLog instance.

BUG=260005
TEST=none, just plumbing.

Review URL: https://codereview.chromium.org/99733004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238637 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 15 insertions, 9 deletions

diff --git a/media/audio/audio_manager.cc b/media/audio/audio_manager.cc
index 3f49a45..03eeb17 100644
--- a/media/audio/audio_manager.cc
+++ b/media/audio/audio_manager.cc
@@ -4,12 +4,12 @@
 
 #include "media/audio/audio_manager.h"
 
-#include "base/at_exit.h"
-#include "base/atomicops.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
+#include "media/audio/fake_audio_log_factory.h"
 
 namespace media {
 namespace {
@@ -17,24 +17,30 @@ AudioManager* g_last_created = NULL;
 }
 
 // Forward declaration of the platform specific AudioManager factory function.
-AudioManager* CreateAudioManager();
+AudioManager* CreateAudioManager(AudioLogFactory* audio_log_factory);
 
-AudioManager::AudioManager() {
-}
+AudioManager::AudioManager() {}
 
 AudioManager::~AudioManager() {
-  CHECK(g_last_created == NULL || g_last_created == this);
+  CHECK(!g_last_created || g_last_created == this);
   g_last_created = NULL;
 }
 
 // static
-AudioManager* AudioManager::Create() {
-  CHECK(g_last_created == NULL);
-  g_last_created = CreateAudioManager();
+AudioManager* AudioManager::Create(AudioLogFactory* audio_log_factory) {
+  CHECK(!g_last_created);
+  g_last_created = CreateAudioManager(audio_log_factory);
   return g_last_created;
 }
 
 // static
+AudioManager* AudioManager::CreateForTesting() {
+  static base::LazyInstance<FakeAudioLogFactory>::Leaky fake_log_factory =
+      LAZY_INSTANCE_INITIALIZER;
+  return Create(fake_log_factory.Pointer());
+}
+
+// static
 AudioManager* AudioManager::Get() {
   return g_last_created;
 }