Fix leak in PictureTest.cpp

tests/PictureTest.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 "SkBBoxHierarchy.h"
 #include "SkBlurImageFilter.h"
 #include "SkCanvas.h"
@@ skipping 975 matching lines @@
 
 static void test_cull_rect_reset(skiatest::Reporter* reporter) {
     SkPictureRecorder recorder;
     SkRect bounds = SkRect::MakeWH(10, 10);
     SkRTreeFactory factory;
     SkCanvas* canvas = recorder.beginRecording(bounds, &factory);
     bounds = SkRect::MakeWH(100, 100);
     SkPaint paint;
     canvas->drawRect(bounds, paint);
     canvas->drawRect(bounds, paint);
-    const SkBigPicture* picture = recorder.endRecordingAsPicture(bounds)->asSkBigPicture();
+    SkAutoTUnref<const SkPicture> p(recorder.endRecordingAsPicture(bounds));
+    const SkBigPicture* picture = p->asSkBigPicture();
     REPORTER_ASSERT(reporter, picture);
 
     SkRect finalCullRect = picture->cullRect();
     REPORTER_ASSERT(reporter, 0 == finalCullRect.fLeft);
     REPORTER_ASSERT(reporter, 0 == finalCullRect.fTop);
     REPORTER_ASSERT(reporter, 100 == finalCullRect.fBottom);
     REPORTER_ASSERT(reporter, 100 == finalCullRect.fRight);
 
     const SkBBoxHierarchy* pictureBBH = picture->bbh();
     SkRect bbhCullRect = pictureBBH->getRootBound();
@@ skipping 327 matching lines @@
 
 DEF_TEST(MiniRecorderLeftHanging, r) {
     // Any shader or other ref-counted effect will do just fine here.
     SkPaint paint;
     paint.setShader(SkShader::CreateColorShader(SK_ColorRED))->unref();
 
     SkMiniRecorder rec;
     REPORTER_ASSERT(r, rec.drawRect(SkRect::MakeWH(20,30), paint));
     // Don't call rec.detachPicture().  Test succeeds by not asserting or leaking the shader.
 }