Move ThreadWrapper to ProcessThread in base.

webrtc/modules/video_render/mac/video_render_agl.h

Index: webrtc/modules/video_render/mac/video_render_agl.h
diff --git a/webrtc/modules/video_render/mac/video_render_agl.h b/webrtc/modules/video_render/mac/video_render_agl.h
index 11e9c3ba865e24c7b27357f0708d5cec0f3fc64d..0508a3f513fd6fcab9edc641bbe1a0c2c7d9a7d1 100644
--- a/webrtc/modules/video_render/mac/video_render_agl.h
+++ b/webrtc/modules/video_render/mac/video_render_agl.h
@@ -15,8 +15,8 @@
 #ifndef WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_MAC_VIDEO_RENDER_AGL_H_
 #define WEBRTC_MODULES_VIDEO_RENDER_MAIN_SOURCE_MAC_VIDEO_RENDER_AGL_H_
 
+#include "webrtc/base/platform_thread.h"
 #include "webrtc/modules/video_render/video_render_defines.h"
-#include "webrtc/system_wrappers/include/thread_wrapper.h"
 
 #define NEW_HIVIEW_PARENT_EVENT_HANDLER 1
 #define NEW_HIVIEW_EVENT_HANDLER 1
@@ -142,7 +142,7 @@ class VideoRenderAGL {
   bool _fullScreen;
   int _id;
   webrtc::CriticalSectionWrapper& _renderCritSec;
-  rtc::scoped_ptr<webrtc::ThreadWrapper> _screenUpdateThread;
+  rtc::scoped_ptr<webrtc::PlatformThread> _screenUpdateThread;
   webrtc::EventWrapper* _screenUpdateEvent;
   bool _isHIViewRef;
   AGLContext _aglContext;