Untangle HarfBuzz callbacks for glyph width and extents

third_party/WebKit/Source/platform/fonts/skia/SkiaTextMetrics.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SkiaTextMetrics_h
 #define SkiaTextMetrics_h
 
 #include "platform/fonts/Glyph.h"
 
 #include <SkPaint.h>
 #include <hb.h>
 
 namespace blink {
 
 class SkiaTextMetrics final {
 public:
     SkiaTextMetrics(const SkPaint*);
 
-    void getGlyphWidthAndExtentsForHarfBuzz(hb_codepoint_t, hb_position_t* width, hb_glyph_extents_t*);
+    void getGlyphWidthForHarfBuzz(hb_codepoint_t, hb_position_t* width);
+    void getGlyphExtentsForHarfBuzz(hb_codepoint_t, hb_glyph_extents_t*);
 
     void getSkiaBoundsForGlyph(Glyph, SkRect* bounds);
     float getSkiaWidthForGlyph(Glyph);
 
 private:
     const SkPaint* m_paint;
 };
 
 } // namespace blink
 
 #endif