Fix for GrAtlasTextContext memory leak

src/gpu/GrAtlasTextContext.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAtlasTextContext_DEFINED
 #define GrAtlasTextContext_DEFINED
 
@@ skipping 234 matching lines @@
         SkScalar fMaxMinScale;
         SkScalar fMinMaxScale;
         int fRunCount;
         uint8_t fTextType;
 
         BitmapTextBlob()
             : fMaxMinScale(-SK_ScalarMax)
             , fMinMaxScale(SK_ScalarMax)
             , fTextType(0) {}
 
+        ~BitmapTextBlob() override {
+            for (int i = 0; i < fRunCount; i++) {
+                fRuns[i].~Run();
+            }
+        }
+
         static const Key& GetKey(const BitmapTextBlob& blob) {
             return blob.fKey;
         }
 
         static uint32_t Hash(const Key& key) {
             return SkChecksum::Murmur3(&key, sizeof(Key));
         }
 
         void operator delete(void* p) {
             BitmapTextBlob* blob = reinterpret_cast<BitmapTextBlob*>(p);
@@ skipping 129 matching lines @@
     bool fEnableDFRendering;
     SkAutoTUnref<DistanceAdjustTable> fDistanceAdjustTable;
 
     friend class GrTextBlobCache;
     friend class BitmapTextBatch;
 
     typedef GrTextContext INHERITED;
 };
 
 #endif