Clean up PlatformThread.

webrtc/modules/video_render/windows/video_render_direct3d9.cc

Index: webrtc/modules/video_render/windows/video_render_direct3d9.cc
diff --git a/webrtc/modules/video_render/windows/video_render_direct3d9.cc b/webrtc/modules/video_render/windows/video_render_direct3d9.cc
index 5458c28667eae63cb78ef4cf9d6af52deb42d9c7..83835aebb80a81e959169551c23b67f0baab493d 100644
--- a/webrtc/modules/video_render/windows/video_render_direct3d9.cc
+++ b/webrtc/modules/video_render/windows/video_render_direct3d9.cc
@@ -294,8 +294,8 @@ VideoRenderDirect3D9::VideoRenderDirect3D9(Trace* trace,
     _totalMemory(0),
     _availableMemory(0)
 {
-    _screenUpdateThread = PlatformThread::CreateThread(
-        ScreenUpdateThreadProc, this, "ScreenUpdateThread");
+    _screenUpdateThread.reset(new rtc::PlatformThread(
+        ScreenUpdateThreadProc, this, "ScreenUpdateThread"));
     _screenUpdateEvent = EventTimerWrapper::Create();
     SetRect(&_originalHwndRect, 0, 0, 0, 0);
 }
@@ -305,7 +305,7 @@ VideoRenderDirect3D9::~VideoRenderDirect3D9()
     //NOTE: we should not enter CriticalSection in here!
 
     // Signal event to exit thread, then delete it
-    PlatformThread* tmpPtr = _screenUpdateThread.release();
+    rtc::PlatformThread* tmpPtr = _screenUpdateThread.release();
     if (tmpPtr)
     {
         _screenUpdateEvent->Set();
@@ -546,7 +546,7 @@ int32_t VideoRenderDirect3D9::Init()
         return -1;
     }
     _screenUpdateThread->Start();
-    _screenUpdateThread->SetPriority(kRealtimePriority);
+    _screenUpdateThread->SetPriority(rtc::kRealtimePriority);
 
     // Start the event triggering the render process
     unsigned int monitorFreq = 60;