Fix IMFSample leak in DXVAVideoDecodeAccelerator

media/base/win/mf_helpers.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_WIN_MF_HELPERS_H_
 #define MEDIA_BASE_WIN_MF_HELPERS_H_
 
 #include <mfapi.h>
 #include <stdint.h>
 
@@ skipping 29 matching lines @@
 
 #define RETURN_AND_NOTIFY_ON_HR_FAILURE(result, log, error_code, ret)        \
   RETURN_AND_NOTIFY_ON_FAILURE(SUCCEEDED(result),                            \
                                log << ", HRESULT: 0x" << std::hex << result, \
                                error_code, ret);
 
 MF_INITIALIZER_EXPORT void LogDXVAError(int line);
 
 // Creates a Media Foundation sample with one buffer of length |buffer_length|
 // on a |align|-byte boundary. Alignment must be a perfect power of 2 or 0.
-MF_INITIALIZER_EXPORT IMFSample* CreateEmptySampleWithBuffer(
-    uint32_t buffer_length,
-    int align);
+MF_INITIALIZER_EXPORT base::win::ScopedComPtr<IMFSample>
+CreateEmptySampleWithBuffer(uint32_t buffer_length, int align);
 
 // Provides scoped access to the underlying buffer in an IMFMediaBuffer
 // instance.
 class MF_INITIALIZER_EXPORT MediaBufferScopedPointer {
  public:
   MediaBufferScopedPointer(IMFMediaBuffer* media_buffer);
   ~MediaBufferScopedPointer();
 
   uint8_t* get() { return buffer_; }
   DWORD current_length() const { return current_length_; }
 
  private:
   base::win::ScopedComPtr<IMFMediaBuffer> media_buffer_;
   uint8_t* buffer_;
   DWORD max_length_;
   DWORD current_length_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaBufferScopedPointer);
 };
 
 }  // namespace mf
 
 }  // namespace media
 
-#endif  // MEDIA_BASE_WIN_MF_HELPERS_H_
+#endif  // MEDIA_BASE_WIN_MF_HELPERS_H_