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

include/ports/SkFontMgr_indirect.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkFontMgr_indirect_DEFINED
 #define SkFontMgr_indirect_DEFINED
 
 #include "SkDataTable.h"
 #include "SkFontMgr.h"
 #include "SkFontStyle.h"
-#include "SkMutex.h"
 #include "SkRemotableFontMgr.h"
 #include "SkTArray.h"
 #include "SkTypeface.h"
 
 class SkData;
 class SkStream;
 class SkString;
 class SkTypeface;
 
 class SK_API SkFontMgr_Indirect : public SkFontMgr {
@@ skipping 72 matching lines @@
 
     mutable SkAutoTUnref<SkDataTable> fFamilyNames;
     mutable bool fFamilyNamesInited;
     mutable SkMutex fFamilyNamesMutex;
     static void set_up_family_names(const SkFontMgr_Indirect* self);
 
     friend class SkStyleSet_Indirect;
 };
 
 #endif