Get rid of leaks in SkCodec::NewFromStream.

src/codec/SkCodec_wbmp.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCodec.h"
 #include "SkColorPriv.h"
 #include "SkStream.h"
@@ skipping 136 matching lines @@
         dst += rowBytes;
     }
     return SkImageGenerator::kSuccess;
 }
 
 bool SkWbmpCodec::IsWbmp(SkStream* stream) {
     return read_header(stream, NULL);
 }
 
 SkCodec* SkWbmpCodec::NewFromStream(SkStream* stream) {
+    SkAutoTDelete<SkStream> streamDeleter(stream);
     SkISize size;
     if (!read_header(stream, &size)) {
         return NULL;
     }
     SkImageInfo info =
             SkImageInfo::Make(size.width(), size.height(), kGray_8_SkColorType,
                               kOpaque_SkAlphaType);
-    return SkNEW_ARGS(SkWbmpCodec, (info, stream));
+    return SkNEW_ARGS(SkWbmpCodec, (info, streamDeleter.detach()));
 }