Defer OSX output stream Start() around system supend and resume.

media/audio/mac/audio_auhal_mac_unittest.cc

Index: media/audio/mac/audio_auhal_mac_unittest.cc
diff --git a/media/audio/mac/audio_auhal_mac_unittest.cc b/media/audio/mac/audio_auhal_mac_unittest.cc
index 856b0f218922a97b7c0d631f61cd8c888f4c9f0e..4279435ee9e58d963db56ba0d8d340bf6d0d9891 100644
--- a/media/audio/mac/audio_auhal_mac_unittest.cc
+++ b/media/audio/mac/audio_auhal_mac_unittest.cc
@@ -43,7 +43,10 @@ class AUHALStreamTest : public testing::Test {
  public:
   AUHALStreamTest()
       : message_loop_(base::MessageLoop::TYPE_UI),
-        manager_(AudioManager::CreateForTesting()) {}
+        manager_(AudioManager::CreateForTesting()) {
+    // Wait for the AudioManager to finish any initialization on the audio loop.
+    base::RunLoop().RunUntilIdle();
+  }
 
   virtual ~AUHALStreamTest() {
     base::RunLoop().RunUntilIdle();