fix leak in test

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 484 matching lines @@
  * Given either a SkStream or a SkData, try to decode the encoded
  * image using the specified options and report errors.
  */
 static void test_options(skiatest::Reporter* reporter,
                          const SkDecodingImageGenerator::Options& opts,
                          SkStreamRewindable* encodedStream,
                          SkData* encodedData,
                          bool useData,
                          const SkString& path) {
     SkBitmap bm;
-    SkImageGenerator* gen;
+    SkAutoTDelete<SkImageGenerator> gen;
 
     if (useData) {
         if (nullptr == encodedData) {
             return;
         }
-        gen = SkDecodingImageGenerator::Create(encodedData, opts);
+        gen.reset(SkDecodingImageGenerator::Create(encodedData, opts));
     } else {
         if (nullptr == encodedStream) {
             return;
         }
-        gen = SkDecodingImageGenerator::Create(encodedStream->duplicate(), opts);
+        gen.reset(SkDecodingImageGenerator::Create(encodedStream->duplicate(), opts));
     }
     if (!gen) {
         if (opts.fUseRequestedColorType && (kARGB_4444_SkColorType == opts.fRequestedColorType)) {
             return;  // Ignore known conversion inabilities.
         }
         // If we get here, it's a failure and we will need more
         // information about why it failed.
         ERRORF(reporter, "Bounds decode failed [sampleSize=%d dither=%s "
                "colorType=%s %s]", opts.fSampleSize, yn(opts.fDitherImage),
                options_colorType(opts), path.c_str());
@@ skipping 117 matching lines @@
 }
 
 DEF_TEST(DecodingImageGenerator_ColorTableCheck, r) {
     SkString resourceDir = GetResourcePath();
     SkString path = SkOSPath::Join(resourceDir.c_str(), "randPixels.gif");
     if (!sk_exists(path.c_str())) {
         return;
     }
     SkAutoDataUnref encoded(SkData::NewFromFileName(path.c_str()));
     SkBitmap bitmap;
-    SkImageGenerator* gen = SkDecodingImageGenerator::Create(encoded,
-                                                             SkDecodingImageGenerator::Options());
+    SkAutoTDelete<SkImageGenerator> gen(SkDecodingImageGenerator::Create(encoded,
+                                                             SkDecodingImageGenerator::Options()));
     if (!gen) {
         REPORTER_ASSERT(r, false);
         return;
     }
     if (!gen->tryGenerateBitmap(&bitmap)) {
         REPORTER_ASSERT(r, false);
         return;
     }
     if (kIndex_8_SkColorType != bitmap.colorType()) {
         return;
@@ skipping 56 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]);
 }