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

src/ports/SkFontMgr_custom.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkFontHost_FreeType_common.h"
 #include "SkFontDescriptor.h"
 #include "SkFontMgr.h"
 #include "SkFontMgr_custom.h"
 #include "SkDescriptor.h"
 #include "SkOSFile.h"
 #include "SkPaint.h"
 #include "SkRTConf.h"
 #include "SkString.h"
 #include "SkStream.h"
+#include "SkThread.h"
 #include "SkTSearch.h"
 #include "SkTypefaceCache.h"
 #include "SkTArray.h"
 
 #include <limits>
 
 /** The base SkTypeface implementation for the custom font manager. */
 class SkTypeface_Custom : public SkTypeface_FreeType {
 public:
     SkTypeface_Custom(const SkFontStyle& style, bool isFixedPitch,
@@ skipping 476 matching lines @@
             addTo->appendTypeface(tf);
         }
     }
 
     const SkEmbeddedResourceHeader* fHeader;
 };
 
 SkFontMgr* SkFontMgr_New_Custom_Embedded(const SkEmbeddedResourceHeader* header) {
     return new SkFontMgr_Custom(EmbeddedSystemFontLoader(header));
 }