Switch to STA mode for audio thread and WASAPI I/O streams.

media/audio/win/audio_manager_win.h

Index: media/audio/win/audio_manager_win.h
diff --git a/media/audio/win/audio_manager_win.h b/media/audio/win/audio_manager_win.h
index ce61eb6cdc967b4082213adc6f1bfde73f609543..5986c70e09fe2101601950a84a0c6d11b9fa71c9 100644
--- a/media/audio/win/audio_manager_win.h
+++ b/media/audio/win/audio_manager_win.h
@@ -55,6 +55,7 @@ class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase {
 
  private:
   enum EnumerationType {
+    kNoEnumeration,
     kMMDeviceEnumeration,
     kWaveEnumeration,
   };
@@ -63,12 +64,14 @@ class MEDIA_EXPORT AudioManagerWin : public AudioManagerBase {
   friend class AudioManagerTest;
 
   EnumerationType enumeration_type_;
-  EnumerationType enumeration_type() { return enumeration_type_; }
-  void SetEnumerationType(EnumerationType type) {
-    enumeration_type_ = type;
+  EnumerationType enumeration_type() const {
+    DCHECK_NE(enumeration_type_, kNoEnumeration);
+    return enumeration_type_;
   }
+  void set_enumeration_type(EnumerationType type) { enumeration_type_ = type; }
 
-  inline bool core_audio_supported() const {
+  bool core_audio_supported() const {
+    DCHECK_NE(enumeration_type_, kNoEnumeration);
     return enumeration_type_ == kMMDeviceEnumeration;
   }