Pull in Chromium's version of GatherPixelRefs

src/utils/SkPictureUtils.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 "SkBitmapDevice.h"
 #include "SkCanvas.h"
 #include "SkData.h"
@@ skipping 32 matching lines @@
 
 static void nothing_to_do() {}
 
 /**
  *  This device will route all bitmaps (primitives and in shaders) to its PRSet.
  *  It should never actually draw anything, so there need not be any pixels
  *  behind its device.
  */
 class GatherPixelRefDevice : public SkBaseDevice {
 public:
+    SK_DECLARE_INST_COUNT(GatherPixelRefDevice)
+
     GatherPixelRefDevice(int width, int height, PixelRefSet* prset) {
         fSize.set(width, height);
         fEmptyBitmap.setConfig(SkBitmap::kNo_Config, width, height);
         fPRSet = prset;
     }
 
     virtual uint32_t getDeviceCapabilities() SK_OVERRIDE { return 0; }
     virtual int width() const SK_OVERRIDE { return fSize.width(); }
     virtual int height() const SK_OVERRIDE { return fSize.height(); }
     virtual bool isOpaque() const SK_OVERRIDE { return false; }
@@ skipping 164 matching lines @@
     canvas.clipRect(area, SkRegion::kIntersect_Op, false);
     canvas.drawPicture(*pict);
 
     SkData* data = NULL;
     int count = array.count();
     if (count > 0) {
         data = SkData::NewFromMalloc(array.detach(), count * sizeof(SkPixelRef*));
     }
     return data;
 }