UMA log for audio_device Init and Start(Playout|Recording). Make Init return a more specific error …

webrtc/modules/audio_device/win/audio_device_core_win.cc

Index: webrtc/modules/audio_device/win/audio_device_core_win.cc
diff --git a/webrtc/modules/audio_device/win/audio_device_core_win.cc b/webrtc/modules/audio_device/win/audio_device_core_win.cc
index 811a04d2fef8971f6c3e888e12a4f4fe72c22ffc..0512fdb3f8c12005f20ba9a2dbec388ac0a273c1 100644
--- a/webrtc/modules/audio_device/win/audio_device_core_win.cc
+++ b/webrtc/modules/audio_device/win/audio_device_core_win.cc
@@ -333,7 +333,9 @@ bool AudioDeviceWindowsCore::CoreAudioIsSupported()
         int temp_ok(0);
         bool available(false);
 
-        ok |= p->Init();
+        if (p->Init() != InitStatus::kOk) {
+          ok |= -1;
+        }
 
         int16_t numDevsRec = p->RecordingDevices();
         for (uint16_t i = 0; i < numDevsRec; i++)
@@ -675,31 +677,28 @@ int32_t AudioDeviceWindowsCore::ActiveAudioLayer(AudioDeviceModule::AudioLayer&
 //  Init
 // ----------------------------------------------------------------------------
 
-int32_t AudioDeviceWindowsCore::Init()
-{
-
-    CriticalSectionScoped lock(&_critSect);
+AudioDeviceGeneric::InitStatus AudioDeviceWindowsCore::Init() {
+  CriticalSectionScoped lock(&_critSect);
 
-    if (_initialized)
-    {
-        return 0;
-    }
+  if (_initialized) {
+    return InitStatus::kOk;
+  }
 
-    _playWarning = 0;
-    _playError = 0;
-    _recWarning = 0;
-    _recError = 0;
+  _playWarning = 0;
+  _playError = 0;
+  _recWarning = 0;
+  _recError = 0;
 
-    // Enumerate all audio rendering and capturing endpoint devices.
-    // Note that, some of these will not be able to select by the user.
-    // The complete collection is for internal use only.
-    //
-    _EnumerateEndpointDevicesAll(eRender);
-    _EnumerateEndpointDevicesAll(eCapture);
+  // Enumerate all audio rendering and capturing endpoint devices.
+  // Note that, some of these will not be able to select by the user.
+  // The complete collection is for internal use only.
+  //
+  _EnumerateEndpointDevicesAll(eRender);
+  _EnumerateEndpointDevicesAll(eCapture);
 
-    _initialized = true;
+  _initialized = true;
 
-    return 0;
+  return InitStatus::kOk;
 }
 
 // ----------------------------------------------------------------------------