SkPDF: add drop() virtual to release resources early.

src/pdf/SkPDFFont.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPDFFont_DEFINED
@@ skipping 175 matching lines @@
 
     // Create instances of derived types based on fontInfo.
     static SkPDFFont* Create(SkPDFCanon* canon,
                              const SkAdvancedTypefaceMetrics* fontInfo,
                              SkTypeface* typeface,
                              uint16_t glyphID,
                              SkPDFDict* relatedFontDescriptor);
 
     static bool Find(uint32_t fontID, uint16_t glyphID, int* index);
 
+    void drop() override;
+
 private:
     sk_sp<SkTypeface> fTypeface;
 
     // The glyph IDs accessible with this font.  For Type1 (non CID) fonts,
     // this will be a subset if the font has more than 255 glyphs.
     uint16_t fFirstGlyphID;
     uint16_t fLastGlyphID;
     sk_sp<const SkAdvancedTypefaceMetrics> fFontInfo;
     sk_sp<SkPDFDict> fDescriptor;
 
     SkAdvancedTypefaceMetrics::FontType fFontType;
 
     typedef SkPDFDict INHERITED;
 };
 
 #endif