Revert of default SkPixelSerializer

debugger/QT/SkDebuggerGUI.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 "SkDebuggerGUI.h"
 #include "SkPicture.h"
 #include <QListWidgetItem>
@@ skipping 263 matching lines @@
     fInspectorWidget.setText(clipStack.c_str(), SkInspectorWidget::kClipStack_TabType);
 
     fInspectorWidget.setMatrix(fDebugger.getCurrentMatrix());
     fInspectorWidget.setClip(fDebugger.getCurrentClip());
 }
 
 void SkDebuggerGUI::saveToFile(const SkString& filename) {
     SkFILEWStream file(filename.c_str());
     SkAutoTUnref<SkPicture> copy(fDebugger.copyPicture());
 
-    SkAutoTUnref<SkPixelSerializer> serializer(
-            SkImageEncoder::CreatePixelSerializer());
-    copy->serialize(&file, serializer);
+    sk_tool_utils::PngPixelSerializer serializer;
+    copy->serialize(&file, &serializer);
 }
 
 void SkDebuggerGUI::loadFile(QListWidgetItem *item) {
     if (item == nullptr) {
         return;
     }
 
     SkString fileName(fPath.toAscii().data());
     // don't add a '/' to files in the local directory
     if (fileName.size() > 0) {
@@ skipping 498 matching lines @@
         fCanvasWidget.drawTo(fPausedRow);
     } else {
         fCanvasWidget.drawTo(fListWidget.currentRow());
     }
 }
 
 void SkDebuggerGUI::updateHit(int newHit) {
     fCommandHitBox.setText(QString::number(newHit));
 }