Implement simple garbage collection in SourceBufferStream

media/filters/source_buffer_stream.h

Index: media/filters/source_buffer_stream.h
diff --git a/media/filters/source_buffer_stream.h b/media/filters/source_buffer_stream.h
index 1c72c238f2b30d1acd4fe147c91f63225ed5d9db..e67a84d0a7a56f01f905d56ddb716029d718a33e 100644
--- a/media/filters/source_buffer_stream.h
+++ b/media/filters/source_buffer_stream.h
@@ -103,8 +103,14 @@ class MEDIA_EXPORT SourceBufferStream {
   base::TimeDelta GetMaxInterbufferDistance() const;
 
  private:
+  friend class SourceBufferStreamTest;
   typedef std::list<SourceBufferRange*> RangeList;
 
+  void set_memory_limit(int memory_limit) { memory_limit_ = memory_limit; }
+
+  // Frees up space if the SourceBufferStream is taking up too much memory.
+  void GarbageCollectIfNeeded();
+
   // Appends |new_buffers| into |range_for_new_buffers_itr|, handling start and
   // end overlaps if necessary.
   // |deleted_next_buffer| is an output parameter that is true if the next
@@ -252,6 +258,9 @@ class MEDIA_EXPORT SourceBufferStream {
   // Stores the largest distance between two adjacent buffers in this stream.
   base::TimeDelta max_interbuffer_distance_;
 
+// The maximum amount of data in bytes the stream will keep in memory.
+  int memory_limit_;
+
   DISALLOW_COPY_AND_ASSIGN(SourceBufferStream);
 };