update callsites for Make image factories

tests/ReadPixelsTest.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkColorPriv.h"
 #include "SkMathPriv.h"
@@ skipping 538 matching lines @@
 
     SkPaint paint;
     paint.setFilterQuality(quality);
 
     canvas->translate(40, 100);
     canvas->rotate(30);
     canvas->scale(20, 30);
     canvas->translate(-SkScalarHalf(bm.width()), -SkScalarHalf(bm.height()));
     canvas->drawBitmap(bm, 0, 0, &paint);
 
-    SkAutoTUnref<SkImage> image(surf->newImageSnapshot());
-    return image->encode();
+    return surf->makeImageSnapshot()->encode();
 }
 
 #include "SkStream.h"
 static void dump_to_file(const char name[], SkData* data) {
     SkFILEWStream file(name);
     file.write(data->data(), data->size());
 }
 
 /*
  *  Test two different ways to turn a subset of a bitmap into a texture
@@ skipping 46 matching lines @@
         SkAutoTUnref<SkData> dataB(draw_into_surface(surfB, tx_subset, quality));
 
         REPORTER_ASSERT(reporter, dataA->equals(dataB));
         if (false) {
             dump_to_file("test_image_A.png", dataA);
             dump_to_file("test_image_B.png", dataB);
         }
     }
 }
 #endif