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 644a6b6da270fde49a4aa8e450ae04c0801a599a..6f7bf927c1d78a63a990df9da4965b7d4720b3ad 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -153,6 +153,7 @@
 #include "third_party/mojo/src/mojo/edk/js/core.h"
 #include "third_party/mojo/src/mojo/edk/js/support.h"
 #include "url/url_util.h"
+#include "v8/include/v8.h"
 
 #if defined(ENABLE_PLUGINS)
 #include "content/renderer/npapi/webplugin_impl.h"
@@ -2142,6 +2143,8 @@ 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(v8::Isolate::GetCurrent())),

[ulan, 2015/10/27 12:02:26]

v8::Isolate::GetCurrent() is going to be deprecated.
The V8 users should keep isolate and pass it explicitly.

I am not sure if it is possible to get to the isolate corresponding to the media
player from here.

Adding jochen@ and haraken@, who might know more.

[jochen (gone - plz use gerrit), 2015/10/27 12:03:54]

just use blink::mainThreadIsolate() to get the main thread's isolate

[DaleCurtis, 2015/10/27 23:14:20]

Done.

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