Clean up a few includes, introduce iwyu.

include/ports/SkRemotableFontMgr.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 SkRemotableFontMgr_DEFINED
 #define SkRemotableFontMgr_DEFINED
 
 #include "SkFontStyle.h"
 #include "SkRefCnt.h"
 #include "SkTemplates.h"
+#include "SkTypes.h"
 
 class SkDataTable;
 class SkStreamAsset;
-class SkString;
 
 struct SK_API SkFontIdentity {
     static const uint32_t kInvalidDataId = 0xFFFFFFFF;
 
     // Note that fDataId is a data identifier, not a font identifier.
     // (fDataID, fTtcIndex) can be seen as a font identifier.
     uint32_t fDataId;
     uint32_t fTtcIndex;
 
     // On Linux/FontConfig there is also the ability to specify preferences for rendering
     // antialias, embedded bitmaps, autohint, hinting, hintstyle, lcd rendering
     // may all be set or set to no-preference
     // (No-preference is resolved against globals set by the platform)
     // Since they may be selected against, these are really 'extensions' to SkFontStyle.
     // SkFontStyle should pick these up.
     SkFontStyle fFontStyle;
 };
 
 class SK_API SkRemotableFontIdentitySet : public SkRefCnt {
 public:
-    
-
     SkRemotableFontIdentitySet(int count, SkFontIdentity** data);
 
     int count() const { return fCount; }
     const SkFontIdentity& at(int index) const { return fData[index]; }
 
     static SkRemotableFontIdentitySet* NewEmpty();
 
 private:
     SkRemotableFontIdentitySet() : fCount(0), fData() { }
 
     friend SkRemotableFontIdentitySet* sk_remotable_font_identity_set_new();
 
     int fCount;
     SkAutoTMalloc<SkFontIdentity> fData;
 
     typedef SkRefCnt INHERITED;
 };
 
 class SK_API SkRemotableFontMgr : public SkRefCnt {
 public:
-    
-
     /**
      *  Returns the names of the known fonts on the system.
      *  Will not return NULL, will return an empty table if no families exist.
      *
      *  The indexes may be used with getIndex(int) and
      *  matchIndexStyle(int, SkFontStyle).
      *
      *  The caller must unref() the returned object.
      */
     virtual SkDataTable* getFamilyNames() const = 0;
@@ skipping 73 matching lines @@
      *
      *  The caller must unref() the returned object.
      */
     virtual SkStreamAsset* getData(int dataId) const = 0;
 
 private:
     typedef SkRefCnt INHERITED;
 };
 
 #endif