Introduce the playback time into the MSE garbage collection.

media/filters/legacy_frame_processor.h

Index: media/filters/legacy_frame_processor.h
diff --git a/media/filters/legacy_frame_processor.h b/media/filters/legacy_frame_processor.h
index c37dd7b21dbea0802d6516c2660da3d591d55196..f32ea6bdff44936ea6e4ef7101e468e467d354c6 100644
--- a/media/filters/legacy_frame_processor.h
+++ b/media/filters/legacy_frame_processor.h
@@ -32,7 +32,8 @@ class MEDIA_EXPORT LegacyFrameProcessor : public FrameProcessorBase {
                              base::TimeDelta append_window_start,
                              base::TimeDelta append_window_end,
                              bool* new_media_segment,
-                             base::TimeDelta* timestamp_offset) OVERRIDE;
+                             base::TimeDelta* timestamp_offset,
+                             base::TimeDelta media_time) OVERRIDE;
 
  private:
   // Helper function that adds |timestamp_offset| to each buffer in |buffers|.
@@ -58,7 +59,8 @@ class MEDIA_EXPORT LegacyFrameProcessor : public FrameProcessorBase {
   // Returns true if the append was successful. Returns false if
   // |stream| is NULL or something in |buffers| caused the append to fail.
   bool AppendAndUpdateDuration(ChunkDemuxerStream* stream,
-                               const StreamParser::BufferQueue& buffers);
+                               const StreamParser::BufferQueue& buffers,
+                               base::TimeDelta media_time);
 
   // Helper function for Legacy ProcessFrames() when new text buffers have been
   // parsed.