Add support for cancellation of demuxer reads.

media/filters/file_data_source.h

 // Copyright (c) 2012 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_FILTERS_FILE_DATA_SOURCE_H_
 #define MEDIA_FILTERS_FILE_DATA_SOURCE_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 11 matching lines @@
 class MEDIA_EXPORT FileDataSource : public DataSource {
  public:
   FileDataSource();
   explicit FileDataSource(base::File file);
   ~FileDataSource() override;
 
   bool Initialize(const base::FilePath& file_path);
 
   // Implementation of DataSource.
   void Stop() override;
+  void Abort() override;
   void Read(int64_t position,
             int size,
             uint8_t* data,
             const DataSource::ReadCB& read_cb) override;
   bool GetSize(int64_t* size_out) override;
   bool IsStreaming() override;
   void SetBitrate(int bitrate) override;
 
   // Unit test helpers. Recreate the object if you want the default behaviour.
   void force_read_errors_for_testing() { force_read_errors_ = true; }
   void force_streaming_for_testing() { force_streaming_ = true; }
   uint64_t bytes_read_for_testing() { return bytes_read_; }
   void reset_bytes_read_for_testing() { bytes_read_ = 0; }
 
  private:
   base::MemoryMappedFile file_;
 
   bool force_read_errors_;
   bool force_streaming_;
   uint64_t bytes_read_;
 
   DISALLOW_COPY_AND_ASSIGN(FileDataSource);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FILE_DATA_SOURCE_H_