Revert of Remove SkThread.h, include SkMutex.h or SkAtomics.h as appropriate.

src/ports/SkTLS_win.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTLS.h"
-#include "SkMutex.h"
+#include "SkThread.h"
 
 static bool gOnce = false;
 static DWORD gTlsIndex;
 SK_DECLARE_STATIC_MUTEX(gMutex);
 
 void* SkTLS::PlatformGetSpecific(bool forceCreateTheSlot) {
     if (!forceCreateTheSlot && !gOnce) {
         return NULL;
     }
 
@@ skipping 46 matching lines @@
 #pragma const_seg()
 
 #else
 
 #pragma data_seg(".CRT$XLB")
 PIMAGE_TLS_CALLBACK skia_tls_callback = onTLSCallback;
 #pragma data_seg()
 
 #endif
 }