Fix compilation with SK_ENABLE_INST_COUNT=1

src/image/SkImage_Gpu.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 "SkImage_Base.h"
 #include "SkImagePriv.h"
 #include "SkBitmap.h"
@@ skipping 18 matching lines @@
     }
 
     GrTexture* getTexture() { return fBitmap.getTexture(); }
 
 private:
     SkBitmap    fBitmap;
 
     typedef SkImage_Base INHERITED;
 };
 
-SK_DEFINE_INST_COUNT(SkImage_Gpu)
-
 ///////////////////////////////////////////////////////////////////////////////
 
 SkImage_Gpu::SkImage_Gpu(const SkBitmap& bitmap)
     : INHERITED(bitmap.width(), bitmap.height())
     , fBitmap(bitmap) {
     SkASSERT(NULL != fBitmap.getTexture());
 }
 
 SkImage_Gpu::~SkImage_Gpu() {
 }
@@ skipping 18 matching lines @@
     if (NULL == bitmap.getTexture()) {
         return NULL;
     }
 
     return SkNEW_ARGS(SkImage_Gpu, (bitmap));
 }
 
 GrTexture* SkTextureImageGetTexture(SkImage* image) {
     return ((SkImage_Gpu*)image)->getTexture();
 }