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

media/blink/webmediaplayer_params.cc

Index: media/blink/webmediaplayer_params.cc
diff --git a/media/blink/webmediaplayer_params.cc b/media/blink/webmediaplayer_params.cc
index 5d88f8713818f3484f428dc457575d0c6c4c9457..ffe3c1b73bda67a81261c0e9b420945ab78bf2bf 100644
--- a/media/blink/webmediaplayer_params.cc
+++ b/media/blink/webmediaplayer_params.cc
@@ -19,6 +19,7 @@ WebMediaPlayerParams::WebMediaPlayerParams(
     const scoped_refptr<base::TaskRunner>& worker_task_runner,
     const scoped_refptr<base::SingleThreadTaskRunner>& compositor_task_runner,
     const Context3DCB& context_3d_cb,
+    const AdjustAllocatedMemoryCB& adjust_allocated_memory_cb,
     MediaPermission* media_permission,
     blink::WebContentDecryptionModule* initial_cdm)
     : defer_load_cb_(defer_load_cb),
@@ -28,6 +29,7 @@ WebMediaPlayerParams::WebMediaPlayerParams(
       worker_task_runner_(worker_task_runner),
       compositor_task_runner_(compositor_task_runner),
       context_3d_cb_(context_3d_cb),
+      adjust_allocated_memory_cb_(adjust_allocated_memory_cb),
       media_permission_(media_permission),
       initial_cdm_(initial_cdm) {}