Fix compilation with SK_ENABLE_INST_COUNT=1

bench/RefCntBench.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkBenchmark.h"
 #include "SkRefCnt.h"
 #include "SkThread.h"
 #include "SkWeakRefCnt.h"
@@ skipping 32 matching lines @@
 public:
     SK_DECLARE_INST_COUNT(PlacedRefCnt)
 
     PlacedRefCnt() : SkRefCnt() { }
     void operator delete(void*) { }
 
 private:
     typedef SkRefCnt INHERITED;
 };
 
-SK_DEFINE_INST_COUNT(PlacedRefCnt)
-
 class RefCntBench_Heap : public SkBenchmark {
 public:
     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
         return backend == kNonRendering_Backend;
     }
 
 protected:
     virtual const char* onGetName() {
         return "ref_cnt_heap";
     }
@@ skipping 128 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_BENCH( return new RefCntBench_Stack(); )
 DEF_BENCH( return new RefCntBench_Heap(); )
 DEF_BENCH( return new RefCntBench_New(); )
 
 DEF_BENCH( return new WeakRefCntBench_Stack(); )
 DEF_BENCH( return new WeakRefCntBench_Heap(); )
 DEF_BENCH( return new WeakRefCntBench_New(); )