Add methods for telling V8 how much memory audio/video is using.

media/filters/ffmpeg_demuxer.cc

 // 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.
 
 #include "media/filters/ffmpeg_demuxer.h"
 
 #include <algorithm>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 899 matching lines @@
     std::string title = stream->GetMetadata("title");
     std::string language = stream->GetMetadata("language");
 
     // TODO: Implement "id" metadata in FFMPEG.
     // See: http://crbug.com/323183
     host_->AddTextStream(stream, TextTrackConfig(kind, title, language,
         std::string()));
   }
 }
 
+int64_t FFmpegDemuxer::GetMemoryUsage() const {
+  int64_t allocation_size = 0;
+  for (const auto& stream : streams_) {
+    if (stream)
+      allocation_size += stream->MemoryUsage();
+  }
+  return allocation_size;
+}
+
 // Helper for calculating the bitrate of the media based on information stored
 // in |format_context| or failing that the size and duration of the media.
 //
 // Returns 0 if a bitrate could not be determined.
 static int CalculateBitrate(
     AVFormatContext* format_context,
     const base::TimeDelta& duration,
     int64 filesize_in_bytes) {
   // If there is a bitrate set on the container, use it.
   if (format_context->bit_rate > 0)
@@ skipping 573 matching lines @@
 
 void FFmpegDemuxer::SetLiveness(DemuxerStream::Liveness liveness) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   for (const auto& stream : streams_) {  // |stream| is a ref to a pointer.
     if (stream)
       stream->SetLiveness(liveness);
   }
 }
 
 }  // namespace media