Clean up a few includes, introduce iwyu.

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 "SkRefCnt.h"
 #include "SkRemotableFontMgr.h"
 #include "SkTArray.h"
 #include "SkTypeface.h"
+#include "SkTypes.h"
 
 class SkData;
-class SkStream;
+class SkFontStyle;
+class SkStreamAsset;
 class SkString;
-class SkTypeface;
 
 class SK_API SkFontMgr_Indirect : public SkFontMgr {
 public:
     // TODO: The SkFontMgr is only used for createFromStream/File/Data.
     // In the future these calls should be broken out into their own interface
     // with a name like SkFontRenderer.
     SkFontMgr_Indirect(SkFontMgr* impl, SkRemotableFontMgr* proxy)
         : fImpl(SkRef(impl)), fProxy(SkRef(proxy)), fFamilyNamesInited(false)
     { }
 
@@ skipping 64 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