fix leaked generator

tests/ImageDecodingTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Resources.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 419 matching lines @@
 /**
  *  A test for the SkDecodingImageGenerator::Create
  */
 DEF_TEST(ImprovedBitmapFactory, reporter) {
     SkString pngFilename = GetResourcePath("randPixels.png");
     SkAutoTDelete<SkStreamRewindable> stream(SkStream::NewFromFile(pngFilename.c_str()));
     if (sk_exists(pngFilename.c_str())) {
         // example of how Android will do this inside their BitmapFactory
         SkDecodingImageGenerator::Options opts(1, true, kN32_SkColorType);
         SkBitmap bm;
-        SkImageGenerator* gen = SkDecodingImageGenerator::Create(stream, opts);
+        SkAutoTDelete<SkImageGenerator> gen(SkDecodingImageGenerator::Create(stream.detach(),
+                                                                             opts));
         REPORTER_ASSERT(reporter, gen->tryGenerateBitmap(&bm));
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 #if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
 static inline bool check_rounding(int value, int dividend, int divisor) {
     // returns true if the value is greater than floor(dividend/divisor)
     // and less than SkNextPow2(ceil(dividend - divisor))
@@ skipping 271 matching lines @@
             new SingleAllocator((void*)pixels.get(), sizeof(uint16_t) * pixelCount));
     decoder->setAllocator(allocator);
     decoder->setSampleSize(2);
     SkBitmap bitmap;
     bool success = decoder->decode(stream, &bitmap, kRGB_565_SkColorType,
                                    SkImageDecoder::kDecodePixels_Mode) != SkImageDecoder::kFailure;
     REPORTER_ASSERT(r, success);
     REPORTER_ASSERT(r, !allocator->ready());  // Decoder used correct memory
     REPORTER_ASSERT(r, sentinal == pixels[pixelCount]);
 }