Delete the typefaces.

bench/SkGlyphCacheBench.cpp

Index: bench/SkGlyphCacheBench.cpp
diff --git a/bench/SkGlyphCacheBench.cpp b/bench/SkGlyphCacheBench.cpp
index 008d434a348a9a2b3397a52450531d7f3622c88e..78659615b8cb3e9403fc4d8b1a7cfb04e45f4ffd 100644
--- a/bench/SkGlyphCacheBench.cpp
+++ b/bench/SkGlyphCacheBench.cpp
@@ -64,6 +64,7 @@ protected:
             do_font_stuff(&paint);
         }
         SkGraphics::SetFontCacheLimit(oldCacheLimitSize);
+        SkSafeUnref(typeface);
     }
 
 private:
@@ -103,6 +104,8 @@ protected:
             });
         }
         SkGraphics::SetFontCacheLimit(oldCacheLimitSize);
+        SkSafeUnref(typefaces[0]);
+        SkSafeUnref(typefaces[1]);
     }
 
 private: