we only need one fontmetrics, since the paint (and fontcache) now know explicitly

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
 
@@ skipping 162 matching lines @@
     /** Map the glyphID to its glyph index, and then to its char code. Unmapped
         glyphs return zero.
     */
     SkUnichar glyphIDToChar(uint16_t glyphID);
 
     unsigned    getGlyphCount() { return this->generateGlyphCount(); }
     void        getAdvance(SkGlyph*);
     void        getMetrics(SkGlyph*);
     void        getImage(const SkGlyph&);
     void        getPath(const SkGlyph&, SkPath*);
-    void        getFontMetrics(SkPaint::FontMetrics* mX,
-                               SkPaint::FontMetrics* mY);
+    void        getFontMetrics(SkPaint::FontMetrics*);
 
 #ifdef SK_BUILD_FOR_ANDROID
     unsigned getBaseGlyphCount(SkUnichar charCode);
 
     // This function must be public for SkTypeface_android.h, but should not be
     // called by other callers
     SkFontID findTypefaceIdForChar(SkUnichar uni);
 #endif
 
     static inline void MakeRec(const SkPaint&, const SkDeviceProperties* deviceProperties,
@@ skipping 93 matching lines @@
     return static_cast<SkPaint::Hinting>(hint);
 }
 
 void SkScalerContextRec::setHinting(SkPaint::Hinting hinting) {
     fFlags = (fFlags & ~SkScalerContext::kHinting_Mask) |
                                 (hinting << SkScalerContext::kHinting_Shift);
 }
 
 
 #endif