Make fID and MixedID calculations private

src/core/SkScalerContext.h

 /*
  * 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.
  */
 
 #ifndef SkScalerContext_DEFINED
 #define SkScalerContext_DEFINED
 
 #include "SkMask.h"
 #include "SkMaskGamma.h"
 #include "SkMatrix.h"
 #include "SkPaint.h"
 #include "SkTypeface.h"
 
-struct SkGlyph;
+class SkGlyph;
 class SkDescriptor;
 class SkMaskFilter;
 class SkPathEffect;
 class SkRasterizer;
 
 /*
  *  To allow this to be forward-declared, it must be its own typename, rather
  *  than a nested struct inside SkScalerContext (where it started).
  */
 struct SkScalerContextRec {
@@ skipping 331 matching lines @@
     return static_cast<SkPaint::Hinting>(hint);
 }
 
 void SkScalerContextRec::setHinting(SkPaint::Hinting hinting) {
     fFlags = (fFlags & ~SkScalerContext::kHinting_Mask) |
                                 (hinting << SkScalerContext::kHinting_Shift);
 }
 
 
 #endif