Fix minor undercounting in SkRecord::bytesUsed().

src/core/SkRecord.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkRecord.h"
 
 SkRecord::~SkRecord() {
     Destroyer destroyer;
     for (unsigned i = 0; i < this->count(); i++) {
         this->mutate<void>(i, destroyer);
     }
 }
 
 void SkRecord::grow() {
     SkASSERT(fCount == fReserved);
     SkASSERT(fReserved > 0);
     fReserved *= 2;
     fRecords.realloc(fReserved);
 }
 
 size_t SkRecord::bytesUsed() const {
-    return fAlloc.approxBytesAllocated() +
-           (fReserved - kInlineRecords) * sizeof(Record) +
-           sizeof(SkRecord);
+    size_t bytes = fAlloc.approxBytesAllocated() + sizeof(SkRecord);
+    // If fReserved <= kInlineRecords, we've already accounted for fRecords with sizeof(SkRecord).
+    // When we go over that limit, they're allocated on the heap (and the inline space is wasted).
+    if (fReserved > kInlineRecords) {
+        bytes += fReserved * sizeof(Record);
+    }
+    return bytes;
 }