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

media/base/pipeline.cc

Index: media/base/pipeline.cc
diff --git a/media/base/pipeline.cc b/media/base/pipeline.cc
index 387470aec070dd242e5486419f9efb15d859a2fa..2527086b89ac07e7102907b8d3963efee1fc3c2c 100644
--- a/media/base/pipeline.cc
+++ b/media/base/pipeline.cc
@@ -466,12 +466,14 @@ void Pipeline::AddBufferedTimeRange(TimeDelta start, TimeDelta end) {
 }
 
 // Called from any thread.
-void Pipeline::OnUpdateStatistics(const PipelineStatistics& stats) {
+void Pipeline::OnUpdateStatistics(const PipelineStatistics& stats_delta) {
   base::AutoLock auto_lock(lock_);
-  statistics_.audio_bytes_decoded += stats.audio_bytes_decoded;
-  statistics_.video_bytes_decoded += stats.video_bytes_decoded;
-  statistics_.video_frames_decoded += stats.video_frames_decoded;
-  statistics_.video_frames_dropped += stats.video_frames_dropped;
+  statistics_.audio_bytes_decoded += stats_delta.audio_bytes_decoded;
+  statistics_.video_bytes_decoded += stats_delta.video_bytes_decoded;
+  statistics_.video_frames_decoded += stats_delta.video_frames_decoded;
+  statistics_.video_frames_dropped += stats_delta.video_frames_dropped;
+  statistics_.audio_memory_usage += stats_delta.audio_memory_usage;
+  statistics_.video_memory_usage += stats_delta.video_memory_usage;
 }
 
 void Pipeline::StartTask() {