Ensure that SkColorTable->fCount is set properly after decodes

include/core/SkColorTable.h

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkColorTable_DEFINED
@@ skipping 51 matching lines @@
     SkColorTable(SkPMColor* colors, int count, AllocatedWithMalloc);
 
     SkPMColor*            fColors;
     mutable uint16_t*     f16BitCache = nullptr;
     mutable SkOnce        f16BitCacheOnce;
     int                   fCount;
 
     void init(const SkPMColor* colors, int count);
 
     friend class SkImageGenerator;
+    friend class SkBitmapRegionCodec;
     // Only call if no other thread or cache has seen this table.
     void dangerous_overwriteColors(const SkPMColor newColors[], int count) {
         if (count < 0 || count > fCount) {
             sk_throw();
         }
         // assumes that f16BitCache nas NOT been initialized yet, so we don't try to update it
         memcpy(fColors, newColors, count * sizeof(SkPMColor));
         fCount = count; // update fCount, in case count is smaller
     }
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif