Clean up PlatformThread.

webrtc/modules/audio_device/dummy/file_audio_device.h

Index: webrtc/modules/audio_device/dummy/file_audio_device.h
diff --git a/webrtc/modules/audio_device/dummy/file_audio_device.h b/webrtc/modules/audio_device/dummy/file_audio_device.h
index a8a71ca62bbbd175984bc4962f7051abcf8644e6..77179409ea25b6841db1cbdbfb5f3a51a114d6fa 100644
--- a/webrtc/modules/audio_device/dummy/file_audio_device.h
+++ b/webrtc/modules/audio_device/dummy/file_audio_device.h
@@ -20,9 +20,12 @@
 #include "webrtc/system_wrappers/include/file_wrapper.h"
 #include "webrtc/system_wrappers/include/clock.h"
 
+namespace rtc {
+class PlatformThread;
+}  // namespace rtc
+
 namespace webrtc {
 class EventWrapper;
-class PlatformThread;
 
 // This is a fake audio device which plays audio from a file as its microphone
 // and plays out into a file.
@@ -178,8 +181,9 @@ class FileAudioDevice : public AudioDeviceGeneric {
   size_t _recordingFramesIn10MS;
   size_t _playoutFramesIn10MS;
 
-  rtc::scoped_ptr<PlatformThread> _ptrThreadRec;
-  rtc::scoped_ptr<PlatformThread> _ptrThreadPlay;
+  // TODO(pbos): Make plain members instead of pointers and stop resetting them.
+  rtc::scoped_ptr<rtc::PlatformThread> _ptrThreadRec;
+  rtc::scoped_ptr<rtc::PlatformThread> _ptrThreadPlay;
 
   bool _playing;
   bool _recording;