Switching WebRTC browser test from AudioManager::HasAudioOutputDevices() to AudioSystem interface.

content/browser/webrtc/webrtc_content_browsertest_base.cc

Index: content/browser/webrtc/webrtc_content_browsertest_base.cc
diff --git a/content/browser/webrtc/webrtc_content_browsertest_base.cc b/content/browser/webrtc/webrtc_content_browsertest_base.cc
index e9cc627b59f8bef7395adb6b81952b527ccb6b92..91a8a77e89c0b84b9aa805fb8dd4562f4e403d08 100644
--- a/content/browser/webrtc/webrtc_content_browsertest_base.cc
+++ b/content/browser/webrtc/webrtc_content_browsertest_base.cc
@@ -13,6 +13,7 @@
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/shell/browser/shell.h"
+#include "media/audio/audio_system.h"
 #include "media/base/media_switches.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 
@@ -107,4 +108,18 @@ void WebRtcContentBrowserTestBase::ExecuteJavascriptAndWaitForOk(
        min_frame_rate, max_frame_rate);
 }
 
+// static
+bool WebRtcContentBrowserTestBase::HasAudioOutputDevices() {
+  bool has_devices = false;
+  base::RunLoop run_loop;
+  media::AudioSystem::Get()->HasOutputDevices(base::Bind(
+      [](base::Closure finished_callback, bool* result, bool received) {
+        *result = received;
+        finished_callback.Run();
+      },
+      base::Passed(run_loop.QuitClosure()), &has_devices));
+  run_loop.Run();
+  return has_devices;
+}
+
 }  // namespace content