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

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 8fff086bd972c94c7323801d4d8ddfd2e128ed7a..b76010225dd1f1bd774ae5be52aea8d5d91c03f7 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -2142,6 +2142,8 @@ blink::WebMediaPlayer* RenderFrameImpl::createMediaPlayer(
       audio_renderer_sink, media_log, render_thread->GetMediaThreadTaskRunner(),
       render_thread->GetWorkerTaskRunner(),
       render_thread->compositor_task_runner(), context_3d_cb,
+      base::Bind(&v8::Isolate::AdjustAmountOfExternalAllocatedMemory,
+                 base::Unretained(blink::mainThreadIsolate())),

[jochen (gone - plz use gerrit), 2015/10/28 14:41:26]

btw, it's important that you invoke this callback on the mainthread. can you
confirm that?

[haraken, 2015/10/28 14:45:36]

mainThreadIsolate() has ASSERT(isMainThread()).

Or you can use toIsolate(Frame*). The fact that you have a frame means that
you're in the main thread.

https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

[DaleCurtis, 2015/10/28 17:56:01]

Yup, main thread callbacks only. WMPI includes a
DCHECK(BelongsToCurrentThread()) too before this callback is executed. I've gone
ahead and added an extra comment in the WMPI code too.

       GetMediaPermission(), initial_cdm);
 
 // TODO(xhwang, watk): Find a better way to specify these ifdef conditions.